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/doc/develop/devicetree/control.rst b/doc/develop/devicetree/control.rst
index c71570d..0b3b32b 100644
--- a/doc/develop/devicetree/control.rst
+++ b/doc/develop/devicetree/control.rst
@@ -135,7 +135,7 @@
 
 To use this, put something like this in your board header file::
 
-   #define CONFIG_EXTRA_ENV_SETTINGS	"fdtcontroladdr=10000\0"
+   #define CFG_EXTRA_ENV_SETTINGS	"fdtcontroladdr=10000\0"
 
 Build: