soc/intel/meteorlake: Add igd device

Add igd device name in soc_acpi_name(), and src/drivers/gfx/generic
can generate device in GFX0 scope in SSDT.

BUG=b:277629750
TEST=emerge-rex coreboot then check SSDT on DUT

Signed-off-by: Won Chung <wonchung@google.com>
Change-Id: Id7a136b5234cf5c0f60ecf253ee78c123f1f573b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75274
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
diff --git a/src/soc/intel/meteorlake/chip.c b/src/soc/intel/meteorlake/chip.c
index 1f7eab81..036c126d 100644
--- a/src/soc/intel/meteorlake/chip.c
+++ b/src/soc/intel/meteorlake/chip.c
@@ -71,6 +71,7 @@
 
 	switch (dev->path.pci.devfn) {
 	case PCI_DEVFN_ROOT:		return "MCHC";
+	case PCI_DEVFN_IGD:		return "GFX0";
 	case PCI_DEVFN_TCSS_XHCI:	return "TXHC";
 	case PCI_DEVFN_TCSS_XDCI:	return "TXDC";
 	case PCI_DEVFN_TCSS_DMA0:	return "TDM0";