[spinel] add documentation on used commands in "spinel.h" (#3265)
[spinel] add documentation on used commands in "spinel.h" (#3265)


turon/openthread,bukepo/openthread,srickardti/openthread,librasungirl/openthread,openthread/openthread,turon/openthread,openthread/openthread,lanyuwen/openthread,jwhui/openthread,turon/openthread,srickardti/openthread,lanyuwen/openthread,bukepo/openthread,erja-gp/openthread,erja-gp/openthread,abtink/openthread,jwhui/openthread,chshu/openthread,jwhui/openthread,bukepo/openthread,chshu/openthread,abtink/openthread,abtink/openthread,turon/openthread,lanyuwen/openthread,chshu/openthread,erja-gp/openthread,abtink/openthread,erja-gp/openthread,librasungirl/openthread,openthread/openthread,lanyuwen/openthread,erja-gp/openthread,chshu/openthread,chshu/openthread,srickardti/openthread,bukepo/openthread,openthread/openthread,jwhui/openthread,lanyuwen/openthread,librasungirl/openthread,librasungirl/openthread,chshu/openthread,erja-gp/openthread,srickardti/openthread,lanyuwen/openthread