skylake: Move CHROMEOS config to SoC

All the mainboards share the same config options for CHROMEOS. Instead
of duplicating those in every mainboard, move the CHROMEOS config to SoC
and make it dependent on MAINBOARD_HAS_CHROMEOS.

BUG=chrome-os-partner:55431

Change-Id: Iafabb6373dfe16aaf0fe2cbc4e978952adeb403e
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://review.coreboot.org/15822
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
diff --git a/src/soc/intel/skylake/Kconfig b/src/soc/intel/skylake/Kconfig
index 0871ed0..126ef2e 100644
--- a/src/soc/intel/skylake/Kconfig
+++ b/src/soc/intel/skylake/Kconfig
@@ -51,6 +51,15 @@
 	select UDELAY_TSC
 	select USE_GENERIC_FSP_CAR_INC
 
+config CHROMEOS
+	select CHROMEOS_RAMOOPS_DYNAMIC
+	select CHROMEOS_VBNV_CMOS
+	select CHROMEOS_VBNV_CMOS_BACKUP_TO_FLASH
+	select EC_SOFTWARE_SYNC if EC_GOOGLE_CHROMEEC
+	select VBOOT_EC_SLOW_UPDATE
+	select VBOOT_OPROM_MATTERS
+	select VIRTUAL_DEV_SWITCH
+
 config BOOTBLOCK_CPU_INIT
 	string
 	default "soc/intel/skylake/bootblock/cpu.c"