drm/virtio: Replace instances of reference/unreference with get/put

Replace reference/unreference with get/put as it is consistent
with the kernel coding style. Done using the following semantic
patch by coccinelle.

@r@
expression e;
@@

-drm_gem_object_unreference_unlocked(e);
+drm_gem_object_put_unlocked(e);

Signed-off-by: Srishti Sharma <srishtishar@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1506679419-7130-1-git-send-email-srishtishar@gmail.com
diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c
index b6d5205..41b0930 100644
--- a/drivers/gpu/drm/virtio/virtgpu_display.c
+++ b/drivers/gpu/drm/virtio/virtgpu_display.c
@@ -53,7 +53,7 @@ static void virtio_gpu_user_framebuffer_destroy(struct drm_framebuffer *fb)
 	struct virtio_gpu_framebuffer *virtio_gpu_fb
 		= to_virtio_gpu_framebuffer(fb);
 
-	drm_gem_object_unreference_unlocked(virtio_gpu_fb->obj);
+	drm_gem_object_put_unlocked(virtio_gpu_fb->obj);
 	drm_framebuffer_cleanup(fb);
 	kfree(virtio_gpu_fb);
 }
@@ -327,7 +327,7 @@ virtio_gpu_user_framebuffer_create(struct drm_device *dev,
 	ret = virtio_gpu_framebuffer_init(dev, virtio_gpu_fb, mode_cmd, obj);
 	if (ret) {
 		kfree(virtio_gpu_fb);
-		drm_gem_object_unreference_unlocked(obj);
+		drm_gem_object_put_unlocked(obj);
 		return NULL;
 	}