drm/tve200: Fix smatch warning

The "ret" variable is ambiguously returning something that
could be zero in the tve200_modeset_init() function, assign
it an explicit error return code to make this unambiguous.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220505215019.2332613-1-linus.walleij@linaro.org

drivers/gpu/drm/tve200/tve200_drv.c

@@ -64,7 +64,7 @@ static int tve200_modeset_init(struct drm_device *dev)
 	struct tve200_drm_dev_private *priv = dev->dev_private;
 	struct drm_panel *panel;
 	struct drm_bridge *bridge;
-	int ret = 0;
+	int ret;
 
 	drm_mode_config_init(dev);
 	mode_config = &dev->mode_config;
@@ -92,6 +92,7 @@ static int tve200_modeset_init(struct drm_device *dev)
 		 * method to get the connector out of the bridge.
 		 */
 		dev_err(dev->dev, "the bridge is not a panel\n");
+		ret = -EINVAL;
 		goto out_bridge;
 	}