camera_trigger:Support more than 8 channles

src/drivers/camera_trigger/camera_trigger_params.c

@@ -148,6 +148,24 @@ PARAM_DEFINE_INT32(TRIG_MODE, 0);
  */
 PARAM_DEFINE_INT32(TRIG_PINS, 56);
 
+/**
+ * Camera trigger pin extended
+ *
+ * This Bit mask selects which FMU pin is used (range: AUX9-AUX32)
+ * If the value is not 0 it takes precedence over TRIG_PINS.
+ *
+ * If bits above 8 are set that value is used as the selector for trigger pins.
+ * greater then 8. 0x00000300 Would be Pins 9,10. If the value is
+ *
+ *
+ * @min 0
+ * @max 4294967040
+ * @decimal 0
+ * @reboot_required true
+ * @group Camera trigger
+ */
+PARAM_DEFINE_INT32(TRIG_PINS_EX, 0);
+
 /**
  * Camera trigger distance
  *