media: i2c: ak7375: use pm_runtime_resume_and_get()

Commit dd8088d5a8 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
added pm_runtime_resume_and_get() in order to automatically handle
dev->power.usage_count decrement on errors.

Use the new API, in order to cleanup the error check logic.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/i2c/ak7375.c

@@ -87,15 +87,7 @@ static const struct v4l2_ctrl_ops ak7375_vcm_ctrl_ops = {
 
 static int ak7375_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 {
-	int ret;
+	return pm_runtime_resume_and_get(sd->dev);
-
-	ret = pm_runtime_get_sync(sd->dev);
-	if (ret < 0) {
-		pm_runtime_put_noidle(sd->dev);
-		return ret;
-	}
-
-	return 0;
 }
 
 static int ak7375_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)