include/uapi/drm/sis_drm.h: move sis_file_private to drivers/gpu/drm/sis/sis_drv.h

Fixes userspace compile error:

drm/sis_drm.h:68:19: error: field ‘obj_list’ has incomplete type
  struct list_head obj_list;

Suggested by Emil Velikov <emil.l.velikov@gmail.com> at
https://lkml.org/lkml/2015/6/3/792Signed-off-by: Mikko Rapeli <mikko.rapeli@iki.fi>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/sis/sis_drv.h

@@ -67,6 +67,10 @@ typedef struct drm_sis_private {
 	struct idr object_idr;
 } drm_sis_private_t;
 
+struct sis_file_private {
+	struct list_head obj_list;
+};
+
 extern int sis_idle(struct drm_device *dev);
 extern void sis_reclaim_buffers_locked(struct drm_device *dev,
 				       struct drm_file *file_priv);

include/uapi/drm/sis_drm.h

@@ -64,8 +64,4 @@ typedef struct {
 	unsigned long offset, size;
 } drm_sis_fb_t;
 
-struct sis_file_private {
-	struct list_head obj_list;
-};
-
 #endif				/* __SIS_DRM_H__ */