xen/x86: support XENPF_settime64
Try XENPF_settime64 first, if it is not available fall back to
XENPF_settime32.
No need to call __current_kernel_time() when all the info needed are
already passed via the struct timekeeper * argument.
Return NOTIFY_BAD in case of errors.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
(cherry picked from commit
760968631323f710ea0824369bbd65f812c82f08)
Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>