soc/intel/common: Add Elkhartlake Device IDs

Add Elkhartlake CPU, SA and PCH IDs.
EHL PCH is code named as MCC.
Also add a MCH ID (JSL_EHL) which is shared by both JSL and EHL SKUs.

Signed-off-by: Lean Sheng Tan <lean.sheng.tan@intel.com>
Change-Id: I03f15832143bcc3095a3936c65fbc30a95e7f0f6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38489
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-by: Ronak Kanabar <ronak.kanabar@intel.com>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/common/block/systemagent/systemagent.c b/src/soc/intel/common/block/systemagent/systemagent.c
index 50e0524..4c7d8c8 100644
--- a/src/soc/intel/common/block/systemagent/systemagent.c
+++ b/src/soc/intel/common/block/systemagent/systemagent.c
@@ -400,6 +400,8 @@
 	PCI_DEVICE_ID_INTEL_TGL_ID_U_1,
 	PCI_DEVICE_ID_INTEL_TGL_ID_Y,
 	PCI_DEVICE_ID_INTEL_JSL_PRE_PROD,
+	PCI_DEVICE_ID_INTEL_JSL_EHL,
+	PCI_DEVICE_ID_INTEL_EHL_ID_1,
 	0
 };