drm/exynos: Remove redundant error messages

kzalloc already has built-in error messages. Hence remove
additional ones.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index df81d3c..bb82ef7 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -47,10 +47,8 @@
 	int nr;
 
 	private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
-	if (!private) {
-		DRM_ERROR("failed to allocate private\n");
+	if (!private)
 		return -ENOMEM;
-	}
 
 	INIT_LIST_HEAD(&private->pageflip_event_list);
 	dev->dev_private = (void *)private;