mboxd: Mark the protocol as reset on shutdown

This is necessary for the host firmware to properly recover from a
daemon restart event, as it needs to re-perform the GET_INFO handshake
and re-establish any window it had active prior to the daemon
restarting.

While we're here, rename the symbol to align with the documentation.

Change-Id: I628d2ee5972177b7ad78392a86122d16104e7011
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/transport_dbus.c b/transport_dbus.c
index d1ef4af..21e097b 100644
--- a/transport_dbus.c
+++ b/transport_dbus.c
@@ -65,7 +65,7 @@
 		}
 	}
 
-	if (events & BMC_EVENT_REBOOT) {
+	if (events & BMC_EVENT_PROTOCOL_RESET) {
 		sd_bus_message *m = NULL;
 
 		rc = sd_bus_message_new_signal(context->bus, &m,