drm/vc4: simplify the return expression of vc4_grab_bin_bo()

Simplify the return expression.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220429090208.3852879-1-chi.minghao@zte.com.cn

drivers/gpu/drm/vc4/vc4_bo.c

@@ -738,19 +738,13 @@ static const struct drm_gem_object_funcs vc4_gem_object_funcs = {
 
 static int vc4_grab_bin_bo(struct vc4_dev *vc4, struct vc4_file *vc4file)
 {
-	int ret;
-
 	if (!vc4->v3d)
 		return -ENODEV;
 
 	if (vc4file->bin_bo_used)
 		return 0;
 
-	ret = vc4_v3d_bin_bo_get(vc4, &vc4file->bin_bo_used);
-	if (ret)
-		return ret;
-
-	return 0;
+	return vc4_v3d_bin_bo_get(vc4, &vc4file->bin_bo_used);
 }
 
 int vc4_create_bo_ioctl(struct drm_device *dev, void *data,