Multiple MSIs have never been supported on s390 architecture, but the
platform code fails to report single MSI only.
Signed-off-by: NAlexander Gordeev <agordeev@redhat.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>