ARM: dts: msm: Add PDC interrupt controller for sdm670

Add pdc-gic interrupt controller as SOC interrupt parent
and as a child domain under intc. Modify TLMM's interrupt
parent as intc irq domain.

Change-Id: I5e2c72d9e1adff993c81d35f8e8a73c3e427ae2b
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>