vulkan: Fix descriptor set layout allocation scope

Fixes: 949ce92 ("vulkan: Add a base struct for descriptor set layouts")
Signed-off-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17818>
1 file changed