drm: Kill DRM_COPY_(TO|FROM)_USER

Less yelling ftw!

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_buffer.c b/drivers/gpu/drm/drm_buffer.c
index 39a7183..0406110 100644
--- a/drivers/gpu/drm/drm_buffer.c
+++ b/drivers/gpu/drm/drm_buffer.c
@@ -114,7 +114,7 @@
 
 	for (idx = 0; idx < nr_pages; ++idx) {
 
-		if (DRM_COPY_FROM_USER(buf->data[idx],
+		if (copy_from_user(buf->data[idx],
 			user_data + idx * PAGE_SIZE,
 			min(PAGE_SIZE, size - idx * PAGE_SIZE))) {
 			DRM_ERROR("Failed to copy user data (%p) to drm buffer"