drm: remove DRM_GETSAREA and replace with drm_getsarea function

Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/char/drm/drmP.h b/drivers/char/drm/drmP.h
index 2277958..8634f76 100644
--- a/drivers/char/drm/drmP.h
+++ b/drivers/char/drm/drmP.h
@@ -1024,6 +1024,8 @@
 extern struct class *drm_class;
 extern struct proc_dir_entry *drm_proc_root;
 
+extern drm_local_map_t *drm_getsarea(struct drm_device *dev);
+
 				/* Proc support (drm_proc.h) */
 extern int drm_proc_init(drm_device_t * dev,
 			 int minor,