em-x270.conf: remove redundant "arm" in PACKAGE_EXTRA_ARCHS
em-x270.conf: remove redundant "arm" in PACKAGE_EXTRA_ARCHS

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ed/openembedded,popazerty/openembedded-cuberevo,trini/openembedded,BlackPole/bp-openembedded,nx111/openembeded_openpli2.1_nx111,JamesAng/goe,buglabs/oe-buglabs,troth/oe-ts7xxx,thebohemian/openembedded,popazerty/openembedded-cuberevo,sampov2/audio-openembedded,bticino/openembedded,sentient-energy/emsw-oe-mirror,JamesAng/oe,nlebedenco/mini2440,thebohemian/openembedded,openpli-arm/openembedded,demsey/openembedded,JamesAng/goe,nvl1109/openembeded,trini/openembedded,JamesAng/goe,buglabs/oe-buglabs,openembedded/openembedded,dave-billin/overo-ui-moos-auv,buglabs/oe-buglabs,sutajiokousagi/openembedded,openpli-arm/openembedded,nvl1109/openembeded,nlebedenco/mini2440,sampov2/audio-openembedded,popazerty/openembedded-cuberevo,Martix/Eonos,bticino/openembedded,giobauermeister/openembedded,dellysunnymtech/sakoman-oe,sledz/oe,demsey/openembedded,trini/openembedded,rascalmicro/openembedded-rascal,mrchapp/arago-oe-dev,openembedded/openembedded,crystalfontz/openembedded,JrCs/opendreambox,JrCs/opendreambox,openembedded/openembedded,JamesAng/oe,SIFTeam/openembedded,hulifox008/openembedded,nx111/openembeded_openpli2.1_nx111,giobauermeister/openembedded,YtvwlD/od-oe,JamesAng/goe,buglabs/oe-buglabs,demsey/openenigma2,SIFTeam/openembedded,nx111/openembeded_openpli2.1_nx111,popazerty/openembedded-cuberevo,trini/openembedded,philb/pbcl-oe-2010,Martix/Eonos,JamesAng/goe,bticino/openembedded,nx111/openembeded_openpli2.1_nx111,libo/openembedded,xifengchuo/openembedded,demsey/openenigma2,nvl1109/openembeded,rascalmicro/openembedded-rascal,JrCs/opendreambox,sledz/oe,thebohemian/openembedded,JrCs/opendreambox,bticino/openembedded,JamesAng/goe,John-NY/overo-oe,libo/openembedded