zink: use cached memory for all resources when possible

this massively speeds up memory access across the driver, specifically
for pbo-related operations

it does require that mapped memory is manually invalidated/flushed, however, and
we also need to manually align host-visible memory to be able to do that

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9884>
2 files changed