mboxd: Rename flash files

Change-Id: Icfe9d61775a198c5a0f8227bf5d6c4b7f11aeec3
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/test/copy_flash.c b/test/copy_flash.c
index b8beb21..d6632d2 100644
--- a/test/copy_flash.c
+++ b/test/copy_flash.c
@@ -11,7 +11,7 @@
 
 #include "common.h"
 #include "mbox.h"
-#include "mboxd_flash.h"
+#include "flash.h"
 
 #include "test/tmpf.h"