global: Migrate CONFIG_BOARDDIR to CFG

Perform a simple rename of CONFIG_BOARDDIR to CFG_BOARDDIR

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/scripts/Makefile.autoconf b/scripts/Makefile.autoconf
index 5a4a148..f5f5e4a 100644
--- a/scripts/Makefile.autoconf
+++ b/scripts/Makefile.autoconf
@@ -112,7 +112,7 @@
 # Prior to Kconfig, it was generated by mkconfig. Now it is created here.
 define filechk_config_h
 	(echo "/* Automatically generated - do not edit */";		\
-	echo \#define CONFIG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\
+	echo \#define CFG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\
 	echo \#include \<config_uncmd_spl.h\>;				\
 	echo \#include \<configs/$(CONFIG_SYS_CONFIG_NAME).h\>;		\
 	echo \#include \<asm/config.h\>;				\