x86/reboot: VMCLEAR active VMCSes before emergency reboot
JIRA: https://issues.redhat.com/browse/RHEL-14437
Fix reboot crash with nested virtualization. This fix is also in the KVM rebase at !3289 (merged) but I created this separately to get it in faster and make it easier to create zstream fixes.
Signed-off-by: Bandan Das bsd@redhat.com
Edited by Lucas Zampieri