commander_params: enable RC override by default

It doesn't affect fixed wing flying anymore. I disabled it for the
deltaquad since I presume @sanderux prefers to have the feature disabled
even when flying in multicopter mode.

ROMFS/px4fmu_common/init.d/airframes/13013_deltaquad

@@ -150,6 +150,7 @@ then
 	param set VT_TRANS_TIMEOUT 22
 	param set VT_F_TRANS_RAMP 4
 
+	param set COM_RC_OVERRIDE 0
 fi
 
 set MAV_TYPE 22