iommu/amd: X2apic mode: re-enable after resume

Otherwise it is guaranteed to not work after the resume...

Fixes: 66929812 ("iommu/amd: Add support for X2APIC IOMMU interrupts")

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20211123161038.48009-3-mlevitsk@redhat.com


Signed-off-by: Joerg Roedel <jroedel@suse.de>