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/MPC837XERDB.h b/include/configs/MPC837XERDB.h
index e0ac933..fad1615 100644
--- a/include/configs/MPC837XERDB.h
+++ b/include/configs/MPC837XERDB.h
@@ -195,7 +195,7 @@
 
 #define FDTFILE			"mpc8379_rdb.dtb"
 
-#define CONFIG_EXTRA_ENV_SETTINGS \
+#define CFG_EXTRA_ENV_SETTINGS \
 	"netdev=eth1\0"				\
 	"uboot=" CONFIG_UBOOTPATH "\0"					\
 	"tftpflash=tftp $loadaddr $uboot;"				\