vmount: adjust MNT_RANGE_PITCH and MNT_RANGE_ROLL defaults

- this seems like a much more reasonable default

src/modules/vmount/vmount_params.c

@@ -188,7 +188,7 @@ PARAM_DEFINE_INT32(MNT_DO_STAB, 0);
 * @decimal 1
 * @group Mount
 */
-PARAM_DEFINE_FLOAT(MNT_RANGE_PITCH, 360.0f);
+PARAM_DEFINE_FLOAT(MNT_RANGE_PITCH, 90.0f);
 
 /**
 * Range of roll channel output in degrees (only in AUX output mode).
@@ -198,7 +198,7 @@ PARAM_DEFINE_FLOAT(MNT_RANGE_PITCH, 360.0f);
 * @decimal 1
 * @group Mount
 */
-PARAM_DEFINE_FLOAT(MNT_RANGE_ROLL, 360.0f);
+PARAM_DEFINE_FLOAT(MNT_RANGE_ROLL, 90.0f);
 
 /**
 * Range of yaw channel output in degrees (only in AUX output mode).