virgl: Correctly align size of blobs

Probably a copy-paste error.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Fixes: cd31f46f08a7 ("virgl/drm: add resource create blob function")
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7332>
1 file changed