soc/intel/alderlake: Add Alder Lake P IGD device IDs

This patch adds additional IGD device IDs as per document 638514.

BUG=b:216420554
TEST=coreboot is able to probe the IGD device during PCI enumeration.

Change-Id: I0cafe92581c454da5e4aeafd7ad52f0e65370b11
Signed-off-by: Kane Chen <kane.chen@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61441
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/include/device/pci_ids.h b/src/include/device/pci_ids.h
index 22962c3..6b53bb0 100644
--- a/src/include/device/pci_ids.h
+++ b/src/include/device/pci_ids.h
@@ -3902,6 +3902,9 @@
 #define PCI_DEVICE_ID_INTEL_ADL_P_GT2_4			0x46a8
 #define PCI_DEVICE_ID_INTEL_ADL_P_GT2_5			0x46b3
 #define PCI_DEVICE_ID_INTEL_ADL_P_GT2_6			0x46a6
+#define PCI_DEVICE_ID_INTEL_ADL_P_GT2_7			0x4628
+#define PCI_DEVICE_ID_INTEL_ADL_P_GT2_8			0x46b1
+#define PCI_DEVICE_ID_INTEL_ADL_P_GT2_9			0x4626
 #define PCI_DEVICE_ID_INTEL_ADL_S_GT1			0x4680
 #define PCI_DEVICE_ID_INTEL_ADL_M_GT1			0x46c0
 #define PCI_DEVICE_ID_INTEL_ADL_M_GT2			0x46aa