mboxd: Rename mboxd_msg to transport_mbox

Change-Id: I0f4e206648c02a98fa938a7e582470c8d90904f1
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/mboxd.c b/mboxd.c
index 0b1357a..5ed42d6 100644
--- a/mboxd.c
+++ b/mboxd.c
@@ -33,7 +33,7 @@
 #include "control_dbus.h"
 #include "flash.h"
 #include "lpc.h"
-#include "mboxd_msg.h"
+#include "transport_mbox.h"
 #include "windows.h"
 #include "vpnor/mboxd_pnor_partition_table.h"