soc/intel/common/pch: Add pch lockdown code

pch lockdown functionality can be used by supported PCH.
Right now pch lockdown functionality is applied for SPT
(Skylake SOC) and CNP(Cannon Lake SOC) PCH.

BUG=b:78109109
BRANCH=none
TEST=Build and boot KBL and CNL platform.

Change-Id: I0b81bbc54f737cb4e7120f44bbe705039b45ccb3
Signed-off-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/25688
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
diff --git a/src/soc/intel/skylake/chip_fsp20.c b/src/soc/intel/skylake/chip_fsp20.c
index ebfad66..00c7163 100644
--- a/src/soc/intel/skylake/chip_fsp20.c
+++ b/src/soc/intel/skylake/chip_fsp20.c
@@ -30,6 +30,7 @@
 #include <fsp/api.h>
 #include <fsp/util.h>
 #include <intelblocks/xdci.h>
+#include <intelpch/lockdown.h>
 #include <romstage_handoff.h>
 #include <soc/acpi.h>
 #include <soc/intel/common/vbt.h>
@@ -211,14 +212,6 @@
 		dev->ops = &cpu_bus_ops;
 }
 
-static int get_lockdown_config(void)
-{
-	const struct soc_intel_common_config *soc_config;
-	soc_config = chip_get_common_soc_structure();
-
-	return soc_config->chipset_lockdown;
-}
-
 struct chip_operations soc_intel_skylake_ops = {
 	CHIP_NAME("Intel 6th Gen")
 	.enable_dev	= &soc_enable,