media: i2c: mt9t112: Use the v4l2 helper for obtaining the clock

devm_clk_get() fails on ACPI-based platforms, where firmware does not
provide a direct reference to the clock producer.

Replace devm_clk_get() with the new v4l2 helper
devm_v4l2_sensor_clk_get() that works on both DT- and ACPI-based
platforms to retrieve a reference to the clock producer from firmware.

Reviewed-by: Lad Prabhakar <[e-mail]>
Reviewed-by: Laurent Pinchart <[e-mail]>
Signed-off-by: Mehdi Djait <[e-mail]>
Signed-off-by: Sakari Ailus <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

drivers/media/i2c/mt9t112.c

···
 
 	v4l2_i2c_subdev_init(&priv->subdev, client, &mt9t112_subdev_ops);
 
-	priv->clk = devm_clk_get(&client->dev, "extclk");
-	if (PTR_ERR(priv->clk) == -ENOENT) {
+	priv->clk = devm_v4l2_sensor_clk_get(&client->dev, "extclk");
+	if (PTR_ERR(priv->clk) == -ENOENT)
 		priv->clk = NULL;
-	} else if (IS_ERR(priv->clk)) {
-		dev_err(&client->dev, "Unable to get clock \"extclk\"\n");
-		return PTR_ERR(priv->clk);
-	}
+	else if (IS_ERR(priv->clk))
+		return dev_err_probe(&client->dev, PTR_ERR(priv->clk),
+				     "Unable to get clock \"extclk\"\n");
 
 	priv->standby_gpio = devm_gpiod_get_optional(&client->dev, "standby",
 						     GPIOD_OUT_HIGH);