xenbus: Fix loopback event channel assuming domain 0

The xenbus event channel established in xenbus_init is intended to be a
loopback channel, but the remote domain was hardcoded to 0; this will
cause the channel to be unusable when xenstore is not being run in
domain 0.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Reviewed-by: Ian Campbell <Ian.Campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

drivers/xen/xenbus/xenbus_probe.c

@@ -724,7 +724,7 @@ static int __init xenbus_init(void)
 
 		/* Next allocate a local port which xenstored can bind to */
 		alloc_unbound.dom        = DOMID_SELF;
-		alloc_unbound.remote_dom = 0;
+		alloc_unbound.remote_dom = DOMID_SELF;
 
 		err = HYPERVISOR_event_channel_op(EVTCHNOP_alloc_unbound,
 						  &alloc_unbound);