drm/exynos: cleanup device pointer usages

Struct device pointer got from platform device pointer is already
alsigned as variable, but some functions do not use device pointer.
So this patch replaces thoes usages.

Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c b/drivers/gpu/drm/exynos/exynos_drm_fimc.c
index 773f583..754d760 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c
@@ -1884,7 +1884,7 @@
 		goto err_pm_dis;
 	}
 
-	dev_info(&pdev->dev, "drm fimc registered successfully.\n");
+	dev_info(dev, "drm fimc registered successfully.\n");
 
 	return 0;