We don't have a running VCPU context to restore vgic3 LPI pending status
due to command KVM_DEV_ARM_{VGIC_GRP_CTRL, ITS_RESTORE_TABLES} on KVM
device "kvm-arm-vgic-its".

Use vgic_write_guest_lock() to restore vgic3 LPI pending status.
Signed-off-by: NGavin Shan <gshan@redhat.com>
Reviewed-by: NOliver Upton <oliver.upton@linux.dev>
Signed-off-by: NMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230126235451.469087-4-gshan@redhat.com