virtio/s390: rename drivers/s390/kvm -> drivers/s390/virtio

This more accurately reflects what these drivers actually do.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

MAINTAINERS

@@ -10577,7 +10577,7 @@ L:	linux-s390@vger.kernel.org
 L:	virtualization@lists.linux-foundation.org
 L:	kvm@vger.kernel.org
 S:	Supported
-F:	drivers/s390/kvm/
+F:	drivers/s390/virtio/
 
 VIRTIO HOST (VHOST)
 M:	"Michael S. Tsirkin" <mst@redhat.com>

drivers/s390/Makefile

@@ -2,7 +2,7 @@
 # Makefile for the S/390 specific device drivers
 #
 
-obj-y += cio/ block/ char/ crypto/ net/ scsi/ kvm/
+obj-y += cio/ block/ char/ crypto/ net/ scsi/ virtio/
 
 drivers-y += drivers/s390/built-in.o