mb/google/dedede: Enable coreboot lock down config

TEST=Build and boot waddledoo board

Change-Id: Ic10af9a0d50946a98a5c4a77b492d242cef171ca
Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41535
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/dedede/variants/baseboard/devicetree.cb

@@ -140,6 +140,7 @@ chip soc/intel/jasperlake
 	#+-------------------+---------------------------+
 	#| Field             |  Value                    |
 	#+-------------------+---------------------------+
+	#| chipset_lockdown  | CHIPSET_LOCKDOWN_COREBOOT |
 	#| GSPI0             | cr50 TPM. Early init is   |
 	#|                   | required to set up a BAR  |
 	#|                   | for TPM communication     |
@@ -151,6 +152,7 @@ chip soc/intel/jasperlake
 	#| I2C4              | Audio                     |
 	#+-------------------+---------------------------+
 	register "common_soc_config" = "{
+		.chipset_lockdown = CHIPSET_LOCKDOWN_COREBOOT,
 		.gspi[0] = {
 			.speed_mhz = 1,
 			.early_init = 1,