xen/acpi: notify xen when reduced hardware sleep is available

Make use of acpi_os_prepare_sleep extended parameter to notify xen
to make use of the reduced hardware sleep functionality

The hypervisor change underlying this is commit 62d1a69 ("ACPI: support
v5 (reduced HW) sleep interface") on the master branch of
git://xenbits.xen.org/xen.git.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Ben Guthro <benjamin.guthro@citrix.com>
Cc: Konrad Wilk <konrad.wilk@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
3 files changed