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/mx51evk.h b/include/configs/mx51evk.h
index ddd37b3..8ab1ee7 100644
--- a/include/configs/mx51evk.h
+++ b/include/configs/mx51evk.h
@@ -39,7 +39,7 @@
 
 /* Framebuffer and LCD */
 
-#define CONFIG_EXTRA_ENV_SETTINGS \
+#define CFG_EXTRA_ENV_SETTINGS \
 	"script=boot.scr\0" \
 	"image=zImage\0" \
 	"fdt_file=imx51-babbage.dtb\0" \