hw/s390x: Move vhost-vsock-ccw code to a separate file

The code should only be enabled if CONFIG_VHOST_VSOCK has been set.
This can be done best if the code resides in a separate file.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1532521224-27235-9-git-send-email-thuth@redhat.com>
[CH: updated MAINTAINERS]
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 03fe789..aa1dd76 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1238,6 +1238,7 @@
 M: Christian Borntraeger <borntraeger@de.ibm.com>
 S: Supported
 F: hw/s390x/virtio-ccw*.[hc]
+F: hw/s390x/vhost-vsock-ccw.c
 T: git git://github.com/cohuck/qemu.git s390-next
 T: git git://github.com/borntraeger/qemu.git s390-next
 L: qemu-s390x@nongnu.org