Simplify handling of o2 and o3 option expansion
Simplify handling of o2 and o3 option expansion

A recent rewrite of some code in this file (commit 355f4b5)
exposed some dialyzer warnings of some code which is unreachable.
Indeed, checking whether one executes on an unsupported architecture
when expanding the 'o2' and 'o3' hipe compiler options is unnecessary
because that check is performed in the expansion of the 'o1' option
anyway.  While at it, simplified the code a bit not to have a very
long case clause.

sdebnath/otp,sdebnath/otp,benoitc/otp-1,goertzenator/otp,vic/otp,lemenkov/otp,g-andrade/otp,isvilen/otp,lantti/otp,bugs-erlang-org/otp,awetzel/otp,RoadRunnr/otp,matwey/otp,jj1bdx/otp,stolen/otp,palas/otp,goertzenator/otp,riverrun/otp,Teino1978-Corp/otp,matwey/otp,dgud/otp,ferd/otp,bernardd/otp,massemanet/otp,enikki/otp,jj1bdx/otp,vladdu/otp,RoadRunnr/otp,NOMORECOFFEE/otp,cnbin/otp,release-project/otp,sammoth-wazoku/otp,haguenau/otp,schlagert/otp,klarna/otp,paulcager/otp,lianghaivv/otp,rlipscombe/otp,basho/otp,yangchengjian/otp,electricimp/otp,jamesruan/otp,sdebnath/otp,jinshana/otp,paladim/otp,haguenau/otp,weisslj/otp,paladim/otp,RichMorin/otp,benoitc/otp-1,jemsbhai/otp,bernardd/otp,psyeugenic/otp,potatosalad/otp,msantos/otp,electricimp/otp,electricimp/otp,tuncer/otp,palas/otp,lightcyphers/otp,hairyhum/otp,jinshana/otp,bsmr-erlang/otp,neeraj9/otp,RGafiyatullin/otp,lemenkov/otp,kvakvs/otp,lantti/otp,jinshana/otp,uabboli/otp,ahmedshafeeq/otp,bjorng/otp,sitexa/otp,msantos/otp,jj1bdx/otp,lianghaivv/otp,GinjaNinja32/otp,lrascao/otp,saleyn/otp,c-rack/otp,paladim/otp,isvilen/otp,weisslj/otp,rlipscombe/otp,awetzel/otp,mikpe/otp,theom/otp,RGafiyatullin/otp,hairyhum/otp,bernardd/otp,uabboli/otp,release-project/otp,enikki/otp,dumbbell/otp,erlang/otp,basho/otp,GinjaNinja32/otp,Teino1978-Corp/erlang-otp,entropiae/otp,vladdu/otp,krishnakumar4a4/otp,lightcyphers/otp,paulcager/otp,vinoski/otp,krishnakumar4a4/otp,massemanet/otp,lrascao/otp,weisslj/otp,dumbbell/otp,klarna/otp,vinoski/otp,isvilen/otp,derek121/otp,release-project/otp,g-andrade/otp,g-andrade/otp,electricimp/otp,cobusc/otp,GinjaNinja32/otp,RGafiyatullin/otp,potatosalad/otp,tuncer/otp,jemsbhai/otp,GinjaNinja32/otp,lantti/otp,c-rack/otp,ader1990/otp,lrascao/otp,c-rack/otp,sammoth-wazoku/otp,bsmr-erlang/otp,ader1990/otp,riverrun/otp,gjaldon/otp,c-rack/otp,GinjaNinja32/otp,derek121/otp,platinumthinker/otp,vic/otp,bjorng/otp,johanclaesson/otp,yangchengjian/otp,dumbbell/otp,stolen/otp,saleyn/otp,lucafavatella/otp,enikki/otp,sitexa/otp,lemenkov/otp,sammoth-wazoku/otp,dgud/otp,vic/otp,gjaldon/otp,erlang/otp,potatosalad/otp,rlipscombe/otp,g-andrade/otp,matwey/otp,rlipscombe/otp,stolen/otp,jamesruan/otp,jj1bdx/otp,jamesruan/otp,ferd/otp,falkevik/otp,paladim/otp,vladdu/otp,mikpe/otp,potatosalad/otp,psyeugenic/otp,GinjaNinja32/otp,riverrun/otp,erlang/otp,lianghaivv/otp,riverrun/otp,hairyhum/otp,awetzel/otp,cnbin/otp,falkevik/otp,c-rack/otp,lhslll/otp,ader1990/otp,fenollp/otp,klarna/otp,haguenau/otp,uabboli/otp,enikki/otp,neeraj9/otp,johanclaesson/otp,emile/otp,klarna/otp,matwey/otp,beni55/otp,psyeugenic/otp,saleyn/otp,awetzel/otp,goertzenator/otp,yangchengjian/otp,sitexa/otp,dumbbell/otp,cnbin/otp,cnbin/otp,beni55/otp,emile/otp,basho/otp,Teino1978-Corp/otp,lemenkov/otp,enikki/otp,cnbin/otp,potatosalad/otp,RJ/otp,mujiatong/otp,basho/otp,erlang/otp,emile/otp,bugs-erlang-org/otp,ferd/otp,c-rack/otp,massemanet/otp,jinshana/otp,saleyn/otp,NOMORECOFFEE/otp,neeraj9/otp,potatosalad/otp,bugs-erlang-org/otp,johanclaesson/otp,emacsmirror/erlang,derek121/otp,rlipscombe/otp,riverrun/otp,RaimoNiskanen/otp,derek121/otp,beni55/otp,paulcager/otp,lantti/otp,lhslll/otp,getong/otp,rlipscombe/otp,RoadRunnr/otp,haguenau/otp,gjaldon/otp,mikpe/otp,theom/otp,lianghaivv/otp,ahmedshafeeq/otp,saleyn/otp,ferd/otp,lrascao/otp,vinoski/otp,theom/otp,lucafavatella/otp,theom/otp,bernardd/otp,RaimoNiskanen/otp,Teino1978-Corp/otp,theom/otp,stolen/otp,ferd/otp,lhslll/otp,theom/otp,goertzenator/otp,krishnakumar4a4/otp,mujiatong/otp,sammoth-wazoku/otp,massemanet/otp,benoitc/otp-1,kvakvs/otp,RoadRunnr/otp,sammoth-wazoku/otp,jemsbhai/otp,bjorng/otp,weisslj/otp,stolen/otp,ader1990/otp,lrascao/otp,benoitc/otp-1,basho/otp,getong/otp,platinumthinker/otp,bjorng/otp,vic/otp,Teino1978-Corp/otp,RaimoNiskanen/otp,weisslj/otp,saleyn/otp,NOMORECOFFEE/otp,marquisthunder/otp,beni55/otp,gjaldon/otp,isvilen/otp,getong/otp,jj1bdx/otp,kvakvs/otp,RichMorin/otp,goertzenator/otp,matwey/otp,lightcyphers/otp,neeraj9/otp,lucafavatella/otp,isvilen/otp,paladim/otp,VincentHHL/otp,aboroska/otp,erlang/otp,RaimoNiskanen/otp,bjorng/otp,jinshana/otp,entropiae/otp,ader1990/otp,mujiatong/otp,lightcyphers/otp,sdebnath/otp,dumbbell/otp,ferd/otp,dgud/otp,Teino1978-Corp/otp,isvilen/otp,marquisthunder/otp,bsmr-erlang/otp,bjorng/otp,lhslll/otp,RichMorin/otp,vinoski/otp,entropiae/otp,rlipscombe/otp,vladdu/otp,basho/otp,haguenau/otp,beni55/otp,entropiae/otp,palas/otp,dgud/otp,psyeugenic/otp,bernardd/otp,lrascao/otp,vinoski/otp,emile/otp,emacsmirror/erlang,enikki/otp,mikpe/otp,stolen/otp,getong/otp,lightcyphers/otp,emacsmirror/erlang,massemanet/otp,ahmedshafeeq/otp,saleyn/otp,lhslll/otp,sdebnath/otp,beni55/otp,NOMORECOFFEE/otp,lianghaivv/otp,jj1bdx/otp,uabboli/otp,schlagert/otp,falkevik/otp,platinumthinker/otp,jj1bdx/otp,klarna/otp,emacsmirror/erlang,legoscia/otp,derek121/otp,RJ/otp,schlagert/otp,RichMorin/otp,Teino1978-Corp/otp,jemsbhai/otp,erlang/otp,ferd/otp,msantos/otp,electricimp/otp,paulcager/otp,fenollp/otp,rlipscombe/otp,bsmr-erlang/otp,theom/otp,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