soc/amd: move common pci_domain_fill_ssdt implementation to acpi/

Even though it has an 'amd_' prefix, the amd_pci_domain_fill_ssdt
implementation doesn't contain any AMD-specific code and can also be
used by other SoCs. So factor it out, move the implementation to
src/acpi/acpigen_pci_root_resource_producer.c, and rename it to
pci_domain_fill_ssdt. When a SoC now assigns pci_domain_fill_ssdt to its
domain operation's acpi_fill_ssdt function pointer, the PCI domain
resource producer information will be added to the SSDT.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I7bd8568cf0b7051c74adbedfe0e416a0938ccb99
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80464
Reviewed-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/mendocino/chip.c

@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
+#include <acpi/acpigen_pci.h>
 #include <amdblocks/acpi.h>
 #include <amdblocks/data_fabric.h>
 #include <amdblocks/fsp.h>
@@ -32,7 +33,7 @@ struct device_operations mendocino_pci_domain_ops = {
 	.scan_bus	= amd_pci_domain_scan_bus,
 	.init		= amd_pci_domain_init,
 	.acpi_name	= soc_acpi_name,
-	.acpi_fill_ssdt	= amd_pci_domain_fill_ssdt,
+	.acpi_fill_ssdt	= pci_domain_fill_ssdt,
 };
 
 static void soc_init(void *chip_info)