physmem: Always pass offset + addr to xen_map_cache

physmem: Always pass offset + addr to xen_map_cache

Always pass address with offset to xen_map_cache().
This is in preparation for support for grant mappings.

Since this is within a block that checks for offset == 0,
this has no functional changes.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240529140739.1387692-5-edgar.iglesias@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>