mboxd: Rename mboxd_msg to transport_mbox

Change-Id: I0f4e206648c02a98fa938a7e582470c8d90904f1
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/vpnor/Makefile.am.include b/vpnor/Makefile.am.include
index 703cfa3..38fc631 100644
--- a/vpnor/Makefile.am.include
+++ b/vpnor/Makefile.am.include
@@ -3,7 +3,7 @@
 	%reldir%/flash.cpp \
 	%reldir%/pnor_partition.cpp \
 	%reldir%/lpc_reset.cpp \
-	%reldir%/mboxd_msg.cpp
+	%reldir%/transport_mbox.cpp
 
 mboxd_LDFLAGS += -lstdc++fs \
 	$(SDBUSPLUS_LIBS) \