[ncp] decode PROP_IPV6_ML_PREFIX property as [6C] (#2625)
[ncp] decode PROP_IPV6_ML_PREFIX property as [6C] (#2625)


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