drm: fix warning on alpha

From: Andrew Morton <akpm@osdl.org>

On alpha:

drivers/char/drm/via_dmablit.h:44: error: field `direction' has incomplete type

Cc: Dave Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dave Airlie <airlied@linux.ie>
1 file changed