drm: Replace filp in ioctl arguments with drm_file *file_priv.

As a fallout, replace filp storage with file_priv storage for "unique
identifier of a client" all over the DRM.  There is a 1:1 mapping, so this
should be a noop.  This could be a minor performance improvement, as everyth
on Linux dereferenced filp to get file_priv anyway, while only the mmap ioct
went the other direction.

Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/savage_drv.h b/drivers/char/drm/savage_drv.h
index 5fd54de..e4eac03 100644
--- a/drivers/char/drm/savage_drv.h
+++ b/drivers/char/drm/savage_drv.h
@@ -212,7 +212,8 @@
 extern int savage_driver_firstopen(struct drm_device *dev);
 extern void savage_driver_lastclose(struct drm_device *dev);
 extern int savage_driver_unload(struct drm_device *dev);
-extern void savage_reclaim_buffers(struct drm_device * dev, DRMFILE filp);
+extern void savage_reclaim_buffers(struct drm_device *dev,
+				   struct drm_file *file_priv);
 
 /* state functions */
 extern void savage_emit_clip_rect_s3d(drm_savage_private_t * dev_priv,