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/imx8mn_var_som.h b/include/configs/imx8mn_var_som.h
index 4633843..2053379 100644
--- a/include/configs/imx8mn_var_som.h
+++ b/include/configs/imx8mn_var_som.h
@@ -37,7 +37,7 @@
 	"pxefile_addr_r=" __stringify(CONFIG_SYS_LOAD_ADDR) "\0" \
 
 /* Initial environment variables */
-#define CONFIG_EXTRA_ENV_SETTINGS \
+#define CFG_EXTRA_ENV_SETTINGS \
 	MEM_LAYOUT_ENV_SETTINGS \
 	BOOTENV