soc/intel/alderlake: Add GFx Device ID 0x46c3

This CL adds support for new ADL-M graphics Device ID 0x46c3.

TEST=boot to OS

Change-Id: Ib55fb501f96fe9bcc328202511bbfe84a3122285
Signed-off-by: Selma Bensaid <selma.bensaid@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57993
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
diff --git a/src/soc/intel/common/block/graphics/graphics.c b/src/soc/intel/common/block/graphics/graphics.c
index d9daaaf..8476b87 100644
--- a/src/soc/intel/common/block/graphics/graphics.c
+++ b/src/soc/intel/common/block/graphics/graphics.c
@@ -310,6 +310,7 @@
 	PCI_DEVICE_ID_INTEL_ADL_S_GT1,
 	PCI_DEVICE_ID_INTEL_ADL_M_GT1,
 	PCI_DEVICE_ID_INTEL_ADL_M_GT2,
+	PCI_DEVICE_ID_INTEL_ADL_M_GT3,
 	0,
 };