drm/legacy: move drm_legacy_master_rmmaps to non-driver legacy header.

This isn't used by drivers, and won't be in the future.

Reviewed-by: Daniel Vetter <[e-mail]>
Signed-off-by: Dave Airlie <[e-mail]>

drivers/gpu/drm/drm_legacy.h

···
 			  int (*)(void *, int, unsigned long, struct drm_buf *),
 			  struct drm_file *);
 
+void drm_legacy_master_rmmaps(struct drm_device *dev,
+			      struct drm_master *master);
+
 #ifdef CONFIG_DRM_VM
 void drm_legacy_vma_flush(struct drm_device *d);
 #else

include/drm/drm_legacy.h

···
 struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, unsigned int token);
 void drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map);
 int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map);
-void drm_legacy_master_rmmaps(struct drm_device *dev,
-			      struct drm_master *master);
 struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev);
 int drm_legacy_mmap(struct file *filp, struct vm_area_struct *vma);