virtio: use KVM_S390_VIRTIO_RING_ALIGN instead of relying on pagesize

This doesn't really matter, since s390 pagesize is 4k anyway.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
2 files changed