drm/rockchip: for error print, use the correct device pointer

There is a use of DRM_DEV_ERROR(dsi->dev,..)
which should be replaced with DRM_DEV_ERROR(dev, ..)
since dsi->dev is set later
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201116141609.26719-2-dafna.hirschfeld@collabora.com

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

@@ -1089,7 +1089,7 @@ static int dw_mipi_dsi_rockchip_probe(struct platform_device *pdev)
 
 	dsi->grf_regmap = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
 	if (IS_ERR(dsi->grf_regmap)) {
-		DRM_DEV_ERROR(dsi->dev, "Unable to get rockchip,grf\n");
+		DRM_DEV_ERROR(dev, "Unable to get rockchip,grf\n");
 		return PTR_ERR(dsi->grf_regmap);
 	}