drm: Give drm_agp_clear drm_legacy_ prefix

It has a  DRIVER_MODESET check to sure make it's not creating havoc
for drm drivers. Make that clear in the name too.

v2: Move misplaced hunk, spotted by 0day and Thierry.

Cc: Thierry Reding <thierry.reding@gmail.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1461691808-12414-2-git-send-email-daniel.vetter@ffwll.ch

drivers/gpu/drm/drm_agpsupport.c

@@ -423,7 +423,7 @@ struct drm_agp_head *drm_agp_init(struct drm_device *dev)
 }
 
 /**
- * drm_agp_clear - Clear AGP resource list
+ * drm_legacy_agp_clear - Clear AGP resource list
  * @dev: DRM device
  *
  * Iterate over all AGP resources and remove them. But keep the AGP head
@@ -434,7 +434,7 @@ struct drm_agp_head *drm_agp_init(struct drm_device *dev)
  * resources from getting destroyed. Drivers are responsible of cleaning them up
  * during device shutdown.
  */
-void drm_agp_clear(struct drm_device *dev)
+void drm_legacy_agp_clear(struct drm_device *dev)
 {
 	struct drm_agp_mem *entry, *tempe;
 

drivers/gpu/drm/drm_fops.c

@@ -413,7 +413,7 @@ int drm_lastclose(struct drm_device * dev)
 
 	mutex_lock(&dev->struct_mutex);
 
-	drm_agp_clear(dev);
+	drm_legacy_agp_clear(dev);
 
 	drm_legacy_sg_cleanup(dev);
 	drm_legacy_vma_flush(dev);

drivers/gpu/drm/drm_pci.c

@@ -250,7 +250,7 @@ void drm_pci_agp_destroy(struct drm_device *dev)
 {
 	if (dev->agp) {
 		arch_phys_wc_del(dev->agp->agp_mtrr);
-		drm_agp_clear(dev);
+		drm_legacy_agp_clear(dev);
 		kfree(dev->agp);
 		dev->agp = NULL;
 	}

include/drm/drm_agpsupport.h

@@ -37,7 +37,7 @@ struct agp_memory *drm_agp_bind_pages(struct drm_device *dev,
 				uint32_t type);
 
 struct drm_agp_head *drm_agp_init(struct drm_device *dev);
-void drm_agp_clear(struct drm_device *dev);
+void drm_legacy_agp_clear(struct drm_device *dev);
 int drm_agp_acquire(struct drm_device *dev);
 int drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
 			  struct drm_file *file_priv);
@@ -93,7 +93,7 @@ static inline struct drm_agp_head *drm_agp_init(struct drm_device *dev)
 	return NULL;
 }
 
-static inline void drm_agp_clear(struct drm_device *dev)
+static inline void drm_legacy_agp_clear(struct drm_device *dev)
 {
 }