Fixes for vfio region cache

Cédric Le Goaterrequested to merge
clegoate/qemu-kvm-centos:RHEL-118810 into c10s

JIRA: https://issues.redhat.com/browse/RHEL-118810

Signed-off-by: Cédric Le Goater clg@redhat.com

Edited by Cédric Le Goater

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