change #include "nand.h" to <flash/nand.h>

Changes from the flat namespace to heirarchical one.  Instead of writing:

	#include "nand.h"

the following form should be used.

	#include <flash/nand.h>

The exception is from .c files in the same directory.

src/flash/nand/nonce.c

@@ -20,7 +20,7 @@
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
-#include "nand.h"
+#include <flash/nand.h>
 
 
 static int nonce_nand_command(struct nand_device *nand, uint8_t command)