global: Migrate CONFIG_EXTRA_ENV_SETTINGS to CFG

Perform a simple rename of CONFIG_EXTRA_ENV_SETTINGS to CFG_EXTRA_ENV_SETTINGS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/nas220.h b/include/configs/nas220.h
index 85691ca..358c3bb 100644
--- a/include/configs/nas220.h
+++ b/include/configs/nas220.h
@@ -35,7 +35,7 @@
  * Default environment variables
  */
 
-#define CONFIG_EXTRA_ENV_SETTINGS \
+#define CFG_EXTRA_ENV_SETTINGS \
 	"bootargs=console=ttyS0,115200\0" \
 	"autostart=no\0"