rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/nand.h b/include/nand.h
index 3296e10..b4f316f 100644
--- a/include/nand.h
+++ b/include/nand.h
@@ -122,7 +122,7 @@
 int nand_unlock( nand_info_t *meminfo, ulong start, ulong length );
 int nand_get_lock_status(nand_info_t *meminfo, ulong offset);
 
-#ifdef CFG_NAND_SELECT_DEVICE
+#ifdef CONFIG_SYS_NAND_SELECT_DEVICE
 void board_nand_select_device(struct nand_chip *nand, int chip);
 #endif