greybus: lights: default value for v4l2 flash controls

V4l2 flash will return erro ERANGE if val(which is the default value)
is not defined. Just set it to the max value reported by the module.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/light.c

@@ -702,6 +702,7 @@ static int __gb_lights_flash_led_register(struct gb_channel *channel)
 	fset->min = channel->intensity_uA.min;
 	fset->max = channel->intensity_uA.max;
 	fset->step = channel->intensity_uA.step;
+	fset->val = channel->intensity_uA.max;
 
 	/* Only the flash mode have the timeout constraints settings */
 	if (channel->mode & GB_CHANNEL_MODE_FLASH) {
@@ -709,6 +710,7 @@ static int __gb_lights_flash_led_register(struct gb_channel *channel)
 		fset->min = channel->timeout_us.min;
 		fset->max = channel->timeout_us.max;
 		fset->step = channel->timeout_us.step;
+		fset->val = channel->timeout_us.max;
 	}
 
 	/*