[patch] add nand_init() prototype to nand.h

since nand_init() is expected to be called by other parts of u-boot, there
should be a prototype for it in nand.h

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Stefan Roese <sr@denx.de>

include/nand.h

@@ -32,6 +32,7 @@ typedef struct mtd_info nand_info_t;
 
 extern int nand_curr_device;
 extern nand_info_t nand_info[];
+extern void nand_init(void);
 
 static inline int nand_read(nand_info_t *info, ulong ofs, ulong *len, u_char *buf)
 {