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/dh_imx6.h b/include/configs/dh_imx6.h
index 3aed629..6aef15c 100644
--- a/include/configs/dh_imx6.h
+++ b/include/configs/dh_imx6.h
@@ -41,7 +41,7 @@
 #endif
 #endif
 
-#define CONFIG_EXTRA_ENV_SETTINGS	\
+#define CFG_EXTRA_ENV_SETTINGS	\
 	"console=ttymxc0,115200\0"	\
 	"fdt_addr=0x18000000\0"		\
 	"fdt_high=0xffffffff\0"		\