drm/agpsupport: Remove extra blank line

Remove extra blank line to adhere to standard coding style.
Found by checkpath.pl..

Signed-off-by: Meghana Madhyastha <meghana.madhyastha@gmail.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/9cfc7e7535908f3fe3b1df706f2999687c90d4e7.1505376068.git.meghana.madhyastha@gmail.com

drivers/gpu/drm/drm_agpsupport.c

@@ -373,7 +373,6 @@ int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request)
 EXPORT_SYMBOL(drm_agp_free);
 
 
-
 int drm_agp_free_ioctl(struct drm_device *dev, void *data,
 		       struct drm_file *file_priv)
 {