The reason we check for staging-resources here is really because they
are the only images guaranteed to be host-visible.
But on UMA architectures, it's quite likely to have memory that is
*both* host-visible *and* device-local, so let's see what we found
instead.
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8858>