drm/rockchip: dsi: Fix unbalanced clock on probe error

Our probe() function never enabled this clock, so we shouldn't disable
it if we fail to probe the bridge.

Noted by inspection.

Fixes: 2d4f7bda ("drm/rockchip: dsi: migrate to use dw-mipi-dsi bridge driver")
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210928143413.v3.3.Ie8ceefb51ab6065a1151869b6fcda41a467d4d2c@changeid

drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c

@@ -1433,14 +1433,10 @@ static int dw_mipi_dsi_rockchip_probe(struct platform_device *pdev)
 		if (ret != -EPROBE_DEFER)
 			DRM_DEV_ERROR(dev,
 				      "Failed to probe dw_mipi_dsi: %d\n", ret);
-		goto err_clkdisable;
+		return ret;
 	}
 
 	return 0;
-
-err_clkdisable:
-	clk_disable_unprepare(dsi->pllref_clk);
-	return ret;
 }
 
 static int dw_mipi_dsi_rockchip_remove(struct platform_device *pdev)