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/soc/intel/common/block/graphics/graphics.c b/src/soc/intel/common/block/graphics/graphics.c
index 1db0e46..4b0b4c4 100644
--- a/src/soc/intel/common/block/graphics/graphics.c
+++ b/src/soc/intel/common/block/graphics/graphics.c
@@ -307,6 +307,9 @@
 	PCI_DEVICE_ID_INTEL_ADL_P_GT2_4,
 	PCI_DEVICE_ID_INTEL_ADL_P_GT2_5,
 	PCI_DEVICE_ID_INTEL_ADL_P_GT2_6,
+	PCI_DEVICE_ID_INTEL_ADL_P_GT2_7,
+	PCI_DEVICE_ID_INTEL_ADL_P_GT2_8,
+	PCI_DEVICE_ID_INTEL_ADL_P_GT2_9,
 	PCI_DEVICE_ID_INTEL_ADL_S_GT1,
 	PCI_DEVICE_ID_INTEL_ADL_M_GT1,
 	PCI_DEVICE_ID_INTEL_ADL_M_GT2,