drm/virtio: align blob resources to page sizes

They trigger the BUG_ON() in drm_gem_private_object_init otherwise.
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20201219031959.92932-1-olvaffe@gmail.com
Cc: Gurchetan Singh <gurchetansingh@chromium.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

drivers/gpu/drm/virtio/virtgpu_vram.c

@@ -134,6 +134,8 @@ int virtio_gpu_vram_create(struct virtio_gpu_device *vgdev,
 
 	obj = &vram->base.base.base;
 	obj->funcs = &virtio_gpu_vram_funcs;
+
+	params->size = PAGE_ALIGN(params->size);
 	drm_gem_private_object_init(vgdev->ddev, obj, params->size);
 
 	/* Create fake offset */