leds: as3645a: Fix error return code in as3645a_parse_node()

Return error code -ENODEV rather than '0' when the indicator node can not
be found.

Fixes: a56ba8fb ("media: leds: as3645a: Add LED flash class driver")
Reported-by: NHulk Robot <hulkci@huawei.com>
Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NZhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: NPavel Machek <pavel@ucw.cz>

drivers/leds/leds-as3645a.c

@@ -545,6 +545,7 @@ static int as3645a_parse_node(struct as3645a *flash,
 	if (!flash->indicator_node) {
 		dev_warn(&flash->client->dev,
 			 "can't find indicator node\n");
+		rval = -ENODEV;
 		goto out_err;
 	}