Fix JFFS2 support for legacy NAND driver.

Some more NAND cleanup and small fixes.
diff --git a/include/configs/stxxtc.h b/include/configs/stxxtc.h
index be6c36c..614a046 100644
--- a/include/configs/stxxtc.h
+++ b/include/configs/stxxtc.h
@@ -436,6 +436,7 @@
 /****************************************************************/
 
 /* NAND */
+#define CFG_NAND_LEGACY
 #define CFG_NAND_BASE		NAND_BASE
 #define CONFIG_MTD_NAND_ECC_JFFS2
 #define CONFIG_MTD_NAND_VERIFY_WRITE