[ncp] resolve undefined shift in BorderRouterConfigToFlagByte (#3522)
[ncp] resolve undefined shift in BorderRouterConfigToFlagByte (#3522)


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