x86: coreboot: Enable support for the configuration editor

Enable cedit support along with required options and a simple style.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/coreboot64_defconfig b/configs/coreboot64_defconfig
index 553f1dc..706c0cd 100644
--- a/configs/coreboot64_defconfig
+++ b/configs/coreboot64_defconfig
@@ -17,6 +17,7 @@
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="root=/dev/sdb3 init=/sbin/init rootwait ro"
 CONFIG_BOOTCOMMAND="bootflow scan -l; if bootflow menu; then cls; bootflow boot; fi"
+CONFIG_CEDIT=y
 CONFIG_SYS_PBSIZE=532
 CONFIG_PRE_CONSOLE_BUFFER=y
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
@@ -46,6 +47,7 @@
 CONFIG_USE_ROOTPATH=y
 CONFIG_REGMAP=y
 CONFIG_SYSCON=y
+CONFIG_OFNODE_MULTI_TREE=y
 # CONFIG_ACPIGEN is not set
 CONFIG_SYS_IDE_MAXDEVICE=4
 CONFIG_SYS_ATA_DATA_OFFSET=0