xen: implement updated XENMEM_add_to_physmap_range ABI

Allows for more fine grained error reporting. Only used by PVH and
ARM both of which are marked EXPERIMENTAL precisely because the ABI
is not yet stable

Signed-off-by: Ian Campbell <[email protected]>
[v1: Rebased without PVH patches]
Signed-off-by: Konrad Rzeszutek Wilk <[email protected]>
2 files changed