media: ov7670: Check the return value from clk_prepare_enable()

clk_prepare_enable() may fail, so we should better check its return value
and propagate it in the case of error.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/ov7670.c

@@ -1615,7 +1615,9 @@ static int ov7670_probe(struct i2c_client *client,
 	info->clk = devm_clk_get(&client->dev, "xclk");
 	if (IS_ERR(info->clk))
 		return PTR_ERR(info->clk);
-	clk_prepare_enable(info->clk);
+	ret = clk_prepare_enable(info->clk);
+	if (ret)
+		return ret;
 
 	ret = ov7670_init_gpio(client, info);
 	if (ret)