s390-virtio, virtio-ccw: Add config_wce for virtio-blk.

There's no reason why we wouldn't want to make the cache mode
configurable.
Acked-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>

hw/s390x/s390-virtio-bus.c

@@ -441,6 +441,7 @@ static Property s390_virtio_blk_properties[] = {
 #ifdef __linux__
     DEFINE_PROP_BIT("scsi", VirtIOBlkS390, blk.scsi, 0, true),
 #endif
+    DEFINE_PROP_BIT("config-wce", VirtIOBlkS390, blk.config_wce, 0, true),
     DEFINE_PROP_END_OF_LIST(),
 };
 

hw/s390x/virtio-ccw.c

@@ -762,6 +762,7 @@ static Property virtio_ccw_blk_properties[] = {
 #ifdef __linux__
     DEFINE_PROP_BIT("scsi", VirtIOBlkCcw, blk.scsi, 0, true),
 #endif
+    DEFINE_PROP_BIT("config-wce", VirtIOBlkCcw, blk.config_wce, 0, true),
     DEFINE_VIRTIO_BLK_FEATURES(VirtioCcwDevice, host_features[0]),
     DEFINE_PROP_END_OF_LIST(),
 };