if750a: use MAVLink gimbal v2 device

ROMFS/px4fmu_common/init.d-posix/airframes/10020_if750a

@@ -12,6 +12,12 @@ if [ $AUTOCNF = yes ]
 then
 	# EKF2: Multi GPS blending (as the model has 2 GPS's)
 	param set EKF2_GPS_MASK 7 # Uses speed, hpos and vpos accuracy
+	param set TRIG_INTERFACE 3
+	param set TRIG_MODE 4
+	param set MNT_MODE_IN 4
+	param set MNT_MODE_OUT 2
+	param set MNT_DO_STAB 2
+
 fi
 
 set MIXER quad_x