mb/intel/tglrvp: Enable early EC sync

- This change is required to execute EC sync in coreboot instead
  of depthcharge

Bug=none
Test=build and boot coreboot on TGLRVP

Signed-off-by: Anil Kumar <anil.kumar.k@intel.com>
Change-Id: I40ae104d4de93c12097e049253a33b23a46c6203
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44689
Reviewed-by: Ravishankar Sarawadi <ravishankar.sarawadi@intel.com>
Reviewed-by: Srinidhi N Kaushik <srinidhi.n.kaushik@intel.com>
Reviewed-by: Shreesh Chhabbi <shreesh.chhabbi@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/intel/tglrvp/Kconfig

@@ -34,6 +34,7 @@ config CHROMEOS
 	select MRC_CLEAR_NORMAL_CACHE_ON_RECOVERY_RETRAIN
 	select GBB_FLAG_FORCE_DEV_SWITCH_ON
 	select GBB_FLAG_FORCE_DEV_BOOT_USB
+	select VBOOT_EARLY_EC_SYNC
 
 config MAINBOARD_DIR
 	string