drm/vgem: Fix typo in driver feature flags

Fix typo in struct field initializer.

Fixes: 3a6eb795 ("drm/vgem: create a render node for vgem")
Cc: Emil Velikov <emil.velikov@collabora.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181105145428.5590-1-imre.deak@intel.com

drivers/gpu/drm/vgem/vgem_drv.c

@@ -432,7 +432,7 @@ static void vgem_release(struct drm_device *dev)
 
 static struct drm_driver vgem_driver = {
 	.driver_features		= DRIVER_GEM | DRIVER_PRIME |
-					  DRIVER_RENDER;
+					  DRIVER_RENDER,
 	.release			= vgem_release,
 	.open				= vgem_open,
 	.postclose			= vgem_postclose,