vhost-user: part of virtio

vhost user is related to virtio, add it to the relevant entry.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 0463696..7a13d68 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -694,6 +694,7 @@
 M: Michael S. Tsirkin <mst@redhat.com>
 S: Supported
 F: hw/*/virtio*
+F: net/vhost-user.c
 
 virtio-9p
 M: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>