backlight: bd6107: Handle deferred probe

Don't pollute dmesg on deferred probe and simplify the code with
dev_err_probe().

Reviewed-by: Daniel Thompson <[e-mail]>
Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Lee Jones <[e-mail]>

drivers/video/backlight/bd6107.c

···
 	struct backlight_device *backlight;
 	struct backlight_properties props;
 	struct bd6107 *bd;
-	int ret;
 
 	if (pdata == NULL) {
 		dev_err(&client->dev, "No platform data\n");
···
 	 * the reset.
 	 */
 	bd->reset = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_HIGH);
-	if (IS_ERR(bd->reset)) {
-		dev_err(&client->dev, "unable to request reset GPIO\n");
-		ret = PTR_ERR(bd->reset);
-		return ret;
-	}
+	if (IS_ERR(bd->reset))
+		return dev_err_probe(&client->dev, PTR_ERR(bd->reset),
+				     "unable to request reset GPIO\n");
 
 	memset(&props, 0, sizeof(props));
 	props.type = BACKLIGHT_RAW;