Revert "soc/amd/cezanne: Add support to perform early EC sync"

This reverts commit ad7c33abd2. With EFS2
already enabled in EC, enabling early EC sync is not required. Also a
workaround has been added in payload to address any boot issues.

BUG=b:185277224
TEST=Build and boot to OS in Guybrush in both normal and recovery mode.

Cq-Depend: chromium:2832032
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Change-Id: I34f8433739754365c8e5a10fdf7e58e3d1e7e797
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52419
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/cezanne/romstage.c

@@ -9,16 +9,12 @@
 #include <console/console.h>
 #include <fsp/api.h>
 #include <program_loading.h>
-#include <security/vboot/vboot_common.h>
 
 asmlinkage void car_stage_entry(void)
 {
 	post_code(0x40);
 	console_init();
 
-	if (CONFIG(VBOOT_EARLY_EC_SYNC))
-		vboot_sync_ec();
-
 	post_code(0x41);
 
 	/* Snapshot chipset state prior to any FSP call */