arch/x86/acpigen: Add helpers for generating _ADR

arch/x86/acpigen: Add helpers for generating _ADR

This change adds the following helpers:
acpigen_write_ADR: Generates _ADR object using provided 64-bit address
acpigen_write_ADR_pci_devfn: Generates _ADR object for PCI bus device
using devfn as input.
acpigen_write_ADR_pci_device: Generates _ADR object for PCI
bus device using struct device * as input.

BUG=b:153858769

Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: I139dfc30aa7db303c1e8bd4a8f9ee0933a60139b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40670
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>