[ncp] send spinel LAST_STATUS error if getting PHY_TX_POWER fails with an error (#2392)
[ncp] send spinel LAST_STATUS error if getting PHY_TX_POWER fails with an error (#2392)


mszczodrak/openthread,xiaom-GitHub/openthread,erja-gp/openthread,abtink/openthread,gandreello/openthread,srickardti/openthread,bukepo/openthread,gandreello/openthread,erja-gp/openthread,xiaom-GitHub/openthread,chshu/openthread,erja-gp/openthread,jwhui/openthread,gandreello/openthread,openthread/openthread,abtink/openthread,chshu/openthread,gandreello/openthread,jwhui/openthread,LeZhang2016/openthread,openthread/openthread,mszczodrak/openthread,bukepo/openthread,jwhui/openthread,pvanhorn/openthread,abtink/openthread,LeZhang2016/openthread,pvanhorn/openthread,pvanhorn/openthread,lanyuwen/openthread,xiaom-GitHub/openthread,xiaom-GitHub/openthread,turon/openthread,bukepo/openthread,chshu/openthread,pvanhorn/openthread,LeZhang2016/openthread,erja-gp/openthread,mszczodrak/openthread,georgecpr/openthread,srickardti/openthread,georgecpr/openthread,lanyuwen/openthread,lanyuwen/openthread,openthread/openthread,mszczodrak/openthread,librasungirl/openthread,abtink/openthread,pvanhorn/openthread,mszczodrak/openthread,srickardti/openthread,georgecpr/openthread,librasungirl/openthread,jwhui/openthread,pvanhorn/openthread,chshu/openthread,librasungirl/openthread,georgecpr/openthread,xiaom-GitHub/openthread,xiaom-GitHub/openthread,turon/openthread,erja-gp/openthread,erja-gp/openthread,lanyuwen/openthread,chshu/openthread,srickardti/openthread,lanyuwen/openthread,LeZhang2016/openthread,bukepo/openthread,gandreello/openthread,turon/openthread,chshu/openthread,librasungirl/openthread,openthread/openthread,gandreello/openthread,LeZhang2016/openthread,LeZhang2016/openthread,georgecpr/openthread,mszczodrak/openthread,lanyuwen/openthread,georgecpr/openthread,turon/openthread