NAND read/write fix

Implement block-skipping read/write, based on a patch from
Morten Ebbell Hestens <morten.hestnes@tandberg.com>.

Signed-off-by: Morten Ebbell Hestnes <morten.hestnes@tandberg.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
diff --git a/include/nand.h b/include/nand.h
index 83d597d..d5af432 100644
--- a/include/nand.h
+++ b/include/nand.h
@@ -108,9 +108,10 @@
 
 typedef struct nand_erase_options nand_erase_options_t;
 
-int nand_write_opts(nand_info_t *mtd, loff_t to, mtd_oob_ops_t *ops);
-
-int nand_read_opts(nand_info_t *meminfo, const nand_read_options_t *opts);
+int nand_read_skip_bad(nand_info_t *nand, size_t offset, size_t *length,
+                       u_char *buffer);
+int nand_write_skip_bad(nand_info_t *nand, size_t offset, size_t *length,
+                        u_char *buffer);
 int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
 
 #define NAND_LOCK_STATUS_TIGHT	0x01