mboxd: Rename lpc source files

Change-Id: I289618c90b2df8911e362397b7eab99403c86c05
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/mboxd_msg.c b/mboxd_msg.c
index e267425..1254e8a 100644
--- a/mboxd_msg.c
+++ b/mboxd_msg.c
@@ -28,7 +28,7 @@
 #include "common.h"
 #include "mboxd_msg.h"
 #include "mboxd_windows.h"
-#include "mboxd_lpc.h"
+#include "lpc.h"
 
 /*
  * write_bmc_event_reg() - Write to the BMC controlled status register (reg 15)