media: drivers:usb:remove unneeded variable

return value form directly instead of
taking this in another redundant variable.

Link: https://lore.kernel.org/linux-media/20211209015009.409428-1-chi.minghao@zte.com.cn
Reported-by: Zeal Robot <zealci@zte.com.cm>
Signed-off-by: chiminghao <chi.minghao@zte.com.cn>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/usb/gspca/m5602/m5602_s5k83a.c

@@ -407,25 +407,21 @@ static int s5k83a_set_gain(struct gspca_dev *gspca_dev, __s32 val)
 
 static int s5k83a_set_brightness(struct gspca_dev *gspca_dev, __s32 val)
 {
-	int err;
 	u8 data[1];
 	struct sd *sd = (struct sd *) gspca_dev;
 
 	data[0] = val;
-	err = m5602_write_sensor(sd, S5K83A_BRIGHTNESS, data, 1);
-	return err;
+	return m5602_write_sensor(sd, S5K83A_BRIGHTNESS, data, 1);
 }
 
 static int s5k83a_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
 {
-	int err;
 	u8 data[2];
 	struct sd *sd = (struct sd *) gspca_dev;
 
 	data[0] = 0;
 	data[1] = val;
-	err = m5602_write_sensor(sd, S5K83A_EXPOSURE, data, 2);
-	return err;
+	return m5602_write_sensor(sd, S5K83A_EXPOSURE, data, 2);
 }
 
 static int s5k83a_set_flip_real(struct gspca_dev *gspca_dev,