mb/google/rex: Disable early EC sync

This patch disables early EC sync to avoid an idle delay (~3sec)
without a provision to notify the user about some critical task
in progress.

Doing EC sync at later stage allows us to notify using graphical msg
on screen to make user aware of the WIP task.

BUG=b:279944831
TEST=Able to perform EC sync from depthcharge on google/rex.

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I03ed40827c50e75ceaaf94e30d675014ebf22dac
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74837
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
diff --git a/src/mainboard/google/rex/Kconfig b/src/mainboard/google/rex/Kconfig
index a45e857..014c3a7 100644
--- a/src/mainboard/google/rex/Kconfig
+++ b/src/mainboard/google/rex/Kconfig
@@ -118,7 +118,6 @@
 	select HAVE_SPD_IN_CBFS
 
 config VBOOT
-	select VBOOT_EARLY_EC_SYNC
 	select VBOOT_LID_SWITCH
 
 config UART_FOR_CONSOLE