drm/client: Rename drm_client_add() to drm_client_register()

This is done to stay consistent with our naming scheme of
_register() = others can start calling us from any thread.

Suggested-by: Daniel Vetter <[e-mail]>
Signed-off-by: Noralf Trønnes <[e-mail]>
Reviewed-by: Daniel Vetter <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/drm_client.c

···
  * @name: Client name
  * @funcs: DRM client functions (optional)
  *
- * This initialises the client and opens a &drm_file. Use drm_client_add() to complete the process.
+ * This initialises the client and opens a &drm_file.
+ * Use drm_client_register() to complete the process.
  * The caller needs to hold a reference on @dev before calling this function.
  * The client is freed when the &drm_device is unregistered. See drm_client_release().
  *
···
 EXPORT_SYMBOL(drm_client_init);
 
 /**
- * drm_client_add - Add client to the device list
+ * drm_client_register - Register client
  * @client: DRM client
  *
  * Add the client to the &drm_device client list to activate its callbacks.
  * @client must be initialized by a call to drm_client_init(). After
- * drm_client_add() it is no longer permissible to call drm_client_release()
+ * drm_client_register() it is no longer permissible to call drm_client_release()
  * directly (outside the unregister callback), instead cleanup will happen
  * automatically on driver unload.
  */
-void drm_client_add(struct drm_client_dev *client)
+void drm_client_register(struct drm_client_dev *client)
 {
 	struct drm_device *dev = client->dev;
 
···
 	list_add(&client->list, &dev->clientlist);
 	mutex_unlock(&dev->clientlist_mutex);
 }
-EXPORT_SYMBOL(drm_client_add);
+EXPORT_SYMBOL(drm_client_register);
 
 /**
  * drm_client_release - Release DRM client resources

drivers/gpu/drm/drm_fb_helper.c

···
 	if (ret)
 		DRM_DEV_DEBUG(dev->dev, "client hotplug ret=%d\n", ret);
 
-	drm_client_add(&fb_helper->client);
+	drm_client_register(&fb_helper->client);
 
 	return 0;
 }

include/drm/drm_client.h

···
 int drm_client_init(struct drm_device *dev, struct drm_client_dev *client,
 		    const char *name, const struct drm_client_funcs *funcs);
 void drm_client_release(struct drm_client_dev *client);
-void drm_client_add(struct drm_client_dev *client);
+void drm_client_register(struct drm_client_dev *client);
 
 void drm_client_dev_unregister(struct drm_device *dev);
 void drm_client_dev_hotplug(struct drm_device *dev);