drm/tegra: rgb: Make tegra_dc_rgb_remove() return void

This function returned zero unconditionally. Make it return no value and
simplify all callers accordingly.

Signed-off-by: Uwe Kleine-König <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

drivers/gpu/drm/tegra/dc.c

···
 static int tegra_dc_remove(struct platform_device *pdev)
 {
 	struct tegra_dc *dc = platform_get_drvdata(pdev);
-	int err;
 
 	host1x_client_unregister(&dc->client);
 
-	err = tegra_dc_rgb_remove(dc);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to remove RGB output: %d\n", err);
-		return err;
-	}
+	tegra_dc_rgb_remove(dc);
 
 	pm_runtime_disable(&pdev->dev);
 

drivers/gpu/drm/tegra/dc.h

···
 
 /* from rgb.c */
 int tegra_dc_rgb_probe(struct tegra_dc *dc);
-int tegra_dc_rgb_remove(struct tegra_dc *dc);
+void tegra_dc_rgb_remove(struct tegra_dc *dc);
 int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc);
 int tegra_dc_rgb_exit(struct tegra_dc *dc);
 

drivers/gpu/drm/tegra/rgb.c

···
 	return 0;
 }
 
-int tegra_dc_rgb_remove(struct tegra_dc *dc)
+void tegra_dc_rgb_remove(struct tegra_dc *dc)
 {
 	struct tegra_rgb *rgb;
 
 	if (!dc->rgb)
-		return 0;
+		return;
 
 	rgb = to_rgb(dc->rgb);
 	clk_put(rgb->pll_d2_out0);
···
 
 	tegra_output_remove(dc->rgb);
 	dc->rgb = NULL;
-
-	return 0;
 }
 
 int tegra_dc_rgb_init(struct drm_device *drm, struct tegra_dc *dc)