drm/tinydrm: Replace drm_dev_unref with drm_dev_put

This patch unifies the naming of DRM functions for reference counting
of struct drm_device. The resulting code is more aligned with the rest
of the Linux kernel interfaces.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180713134601.14391-1-tzimmermann@suse.de

drivers/gpu/drm/tinydrm/core/tinydrm-core.c

@@ -135,7 +135,7 @@ static int tinydrm_init(struct device *parent, struct tinydrm_device *tdev,
 	/*
 	 * We don't embed drm_device, because that prevent us from using
 	 * devm_kzalloc() to allocate tinydrm_device in the driver since
-	 * drm_dev_unref() frees the structure. The devm_ functions provide
+	 * drm_dev_put() frees the structure. The devm_ functions provide
 	 * for easy error handling.
 	 */
 	drm = drm_dev_alloc(driver, parent);
@@ -155,7 +155,7 @@ static void tinydrm_fini(struct tinydrm_device *tdev)
 	drm_mode_config_cleanup(tdev->drm);
 	mutex_destroy(&tdev->dirty_lock);
 	tdev->drm->dev_private = NULL;
-	drm_dev_unref(tdev->drm);
+	drm_dev_put(tdev->drm);
 }
 
 static void devm_tinydrm_release(void *data)
@@ -172,7 +172,7 @@ static void devm_tinydrm_release(void *data)
  *
  * This function initializes @tdev, the underlying DRM device and it's
  * mode_config. Resources will be automatically freed on driver detach (devres)
- * using drm_mode_config_cleanup() and drm_dev_unref().
+ * using drm_mode_config_cleanup() and drm_dev_put().
  *
  * Returns:
  * Zero on success, negative error code on failure.