media: sun4i_v4l2: use pm_runtime_resume_and_get()

Commit dd8088d ("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.

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

drivers/media/platform/sunxi/sun4i-csi/sun4i_v4l2.c

@@ -206,9 +206,9 @@ static int sun4i_csi_open(struct file *file)
 	if (ret)
 		return ret;
 
-	ret = pm_runtime_get_sync(csi->dev);
+	ret = pm_runtime_resume_and_get(csi->dev);
 	if (ret < 0)
-		goto err_pm_put;
+		goto err_unlock;
 
 	ret = v4l2_pipeline_pm_get(&csi->vdev.entity);
 	if (ret)
@@ -225,8 +225,7 @@ static int sun4i_csi_open(struct file *file)
 err_pipeline_pm_put:
 	v4l2_pipeline_pm_put(&csi->vdev.entity);
 
-err_pm_put:
-	pm_runtime_put(csi->dev);
+err_unlock:
 	mutex_unlock(&csi->lock);
 
 	return ret;