arm: keystone2: Rename CONFIG_ENV_KS2_BOARD_SETTINGS

Rename CONFIG_ENV_KS2_BOARD_SETTINGS to ENV_KS2_BOARD_SETTINGS so that
it better fits with the rest of the environment addition macros.

Cc: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/ti_armv7_keystone2.h b/include/configs/ti_armv7_keystone2.h
index cfc2be7..fc2b343 100644
--- a/include/configs/ti_armv7_keystone2.h
+++ b/include/configs/ti_armv7_keystone2.h
@@ -187,7 +187,7 @@
 
 #define CONFIG_EXTRA_ENV_SETTINGS					\
 	DEFAULT_LINUX_BOOT_ENV						\
-	CONFIG_EXTRA_ENV_KS2_BOARD_SETTINGS				\
+	ENV_KS2_BOARD_SETTINGS						\
 	DFUARGS								\
 	"bootdir=/boot\0" \
 	"tftp_root=/\0"							\