vpnor: Rename pnor_partition_defs sources to ffs

Change-Id: I1bb919eec2a12403474d58540c52beab8664b8b8
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/vpnor/pnor_partition_table.hpp b/vpnor/pnor_partition_table.hpp
index 4309ad5..1e2b309 100644
--- a/vpnor/pnor_partition_table.hpp
+++ b/vpnor/pnor_partition_table.hpp
@@ -11,7 +11,7 @@
 #include "backend.h"
 #include "common.h"
 #include "vpnor/backend.h"
-#include "vpnor/pnor_partition_defs.h"
+#include "vpnor/ffs.h"
 }
 
 struct mbox_context;