arm64: PCI: Migrate ACPI related functions to pci-acpi.c

The functions defined in arm64 for ACPI support are required
for RISC-V also. To avoid duplication, move these functions
to common location.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Will Deacon <will@kernel.org>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://patch.msgid.link/20240812005929.113499-2-sunilvl@ventanamicro.com


Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>