Update README.* to reference new CONFIG_CMD_* names now.

Signed-off-by: Jon Loeliger <jdl@freescale.com>
diff --git a/doc/README.nand b/doc/README.nand
index 5c31845..c5c5ef2 100644
--- a/doc/README.nand
+++ b/doc/README.nand
@@ -93,8 +93,8 @@
 
 Configuration Options:
 
-   CFG_CMD_NAND
-      A good one to add to CONFIG_COMMANDS since it enables NAND support.
+   CONFIG_CMD_NAND
+      Enables NAND support and commmands.
 
    CONFIG_MTD_NAND_ECC_JFFS2
       Define this if you want the Error Correction Code information in