drivers: irqchip: pdc: Add QTI SOC interrupt controller

Implement QTI SOC interrupt controller for configuring wakeup interrupts
to wakeup APSS from system sleep. Use hierarchical interrupt domain
framework as the arch-extension are no longer supported on newer kernel.

Change-Id: I8a6ad64ac76ae1758dc3da84abad5d67f92106ab
Signed-off-by: Archana Sathyakumar <asathyak@codeaurora.org>