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/k2e_evm.h b/include/configs/k2e_evm.h
index 716ae3b..65bf646 100644
--- a/include/configs/k2e_evm.h
+++ b/include/configs/k2e_evm.h
@@ -23,7 +23,7 @@
 #endif
 
 /* U-Boot general configuration */
-#define CONFIG_EXTRA_ENV_KS2_BOARD_SETTINGS				\
+#define ENV_KS2_BOARD_SETTINGS						\
 	DEFAULT_FW_INITRAMFS_BOOT_ENV					\
 	DEFAULT_SEC_BOOT_ENV						\
 	"boot=ubi\0"							\