media: ov13b10: Fix some error checking in probe

The "ret = " assignment was missing, so ov13b10_power_on() is not
checked for errors.  Add the assignment.

Fixes: 6e28afd1 ("media: ov13b10: add PM control support based on power resources")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/i2c/ov13b10.c

@@ -1501,7 +1501,7 @@ static int ov13b10_probe(struct i2c_client *client)
 
 	full_power = acpi_dev_state_d0(&client->dev);
 	if (full_power) {
-		ov13b10_power_on(&client->dev);
+		ret = ov13b10_power_on(&client->dev);
 		if (ret) {
 			dev_err(&client->dev, "failed to power on\n");
 			return ret;