irqchip/riscv-aplic: Add ACPI support

Add ACPI support in APLIC drivers. Use the mapping created early during
boot to get the details about the APLIC.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://patch.msgid.link/20240812005929.113499-17-sunilvl@ventanamicro.com


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