mb/siemens/mc_ehl: Prevent reset when TCO expires

In order to guarantee data integrity an expired TCO must not hard reset
the board. Select the Kconfig switch to prevent this reset.

Change-Id: I04080c6bcd486e3a406438cc7a703165bb6945a0
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61178
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/mainboard/siemens/mc_ehl/Kconfig

@@ -35,4 +35,7 @@ config DEVICETREE
 config DIMM_SPD_SIZE
 	default 512
 
+config SOC_INTEL_ELKHARTLAKE_TCO_NO_REBOOT_EN
+	default y
+
 endif # BOARD_SIEMENS_BASEBOARD_MC_EHL