Fix remaining CFG_CMD_ define, ifdef and comments

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/m501sk.h b/include/configs/m501sk.h
index 095fdaf..060330e 100644
--- a/include/configs/m501sk.h
+++ b/include/configs/m501sk.h
@@ -105,7 +105,7 @@
 #define	CONFIG_EXTRA_ENV_SETTINGS \
 		"unlock=yes\0"
 
-#define CFG_CMD_JFFS2
+#define CONFIG_CMD_JFFS2
 #undef CONFIG_CMD_EEPROM
 #define CONFIG_CMD_NET
 #define CONFIG_CMD_RUN