Fixup for "Refinement of Spinel Protocol Documentation (#534)" (#551)
Fixup for "Refinement of Spinel Protocol Documentation (#534)" (#551)

The last commit was missing the makefile.
vaas-krish/openthread,fbsder/openthread,vaas-krish/openthread,GiedriusM/openthread,jjlee3/openthread,gandreello/openthread,mszczodrak/openthread,georgecpr/openthread,fbsder/openthread,georgecpr/openthread,erja-gp/openthread,mszczodrak/openthread,chshu/openthread,jjlee9/openthread,openthread/openthread,aeliot/openthread,srickardti/openthread,aeliot/openthread,librasungirl/openthread,gandreello/openthread,nibanks/openthread,xiaom-GitHub/openthread,Zolertia/openthread,JakubBrachTieto/openthread,jjlee9/openthread,fbsder/openthread,Zolertia/openthread,bukepo/openthread,LeZhang2016/openthread,turon/openthread,fbsder/openthread,GiedriusM/openthread,aeliot/openthread,JakubBrachTieto/openthread,Zolertia/openthread,jwhui/openthread,lanyuwen/openthread,librasungirl/openthread,erja-gp/openthread,GiedriusM/openthread,abtink/openthread,bukepo/openthread,georgecpr/openthread,jjlee9/openthread,xiaom-GitHub/openthread,turon/openthread,aeliot/openthread,gandreello/openthread,jjlee9/openthread,GiedriusM/openthread,chshu/openthread,LeZhang2016/openthread,georgecpr/openthread,LeZhang2016/openthread,chshu/openthread,lanyuwen/openthread,jwhui/openthread,vaas-krish/openthread,bukepo/openthread,jjlee9/openthread,jwhui/openthread,GiedriusM/openthread,pvanhorn/openthread,srickardti/openthread,pvanhorn/openthread,erja-gp/openthread,nibanks/openthread,gandreello/openthread,bukepo/openthread,openthread/openthread,vaas-krish/openthread,gandreello/openthread,Zolertia/openthread,abtink/openthread,fbsder/openthread,turon/openthread,JakubBrachTieto/openthread,lanyuwen/openthread,openthread/openthread,lanyuwen/openthread,LeZhang2016/openthread,srickardti/openthread,mszczodrak/openthread,Zolertia/openthread,georgecpr/openthread,pvanhorn/openthread,erja-gp/openthread,xiaom-GitHub/openthread,mszczodrak/openthread,LeZhang2016/openthread,erja-gp/openthread,gandreello/openthread,JakubBrachTieto/openthread,jjlee3/openthread,vaas-krish/openthread,jjlee9/openthread,abtink/openthread,xiaom-GitHub/openthread,aeliot/openthread,jjlee3/openthread,jwhui/openthread,LeZhang2016/openthread,mszczodrak/openthread,turon/openthread,librasungirl/openthread,xiaom-GitHub/openthread,chshu/openthread,mszczodrak/openthread,JakubBrachTieto/openthread,nibanks/openthread,pvanhorn/openthread,lanyuwen/openthread,srickardti/openthread,georgecpr/openthread,xiaom-GitHub/openthread,nibanks/openthread,lanyuwen/openthread,abtink/openthread,openthread/openthread,nibanks/openthread,JakubBrachTieto/openthread,vaas-krish/openthread,fbsder/openthread,erja-gp/openthread,pvanhorn/openthread,chshu/openthread,jjlee3/openthread,nibanks/openthread,librasungirl/openthread,aeliot/openthread,pvanhorn/openthread,jjlee3/openthread,chshu/openthread