ARM: dts: msm: Add support for AOP clock for SDM670

QDSS clock is required for QDSS clients to send clock
requests using the clock aop handle.

Change-Id: I15412fbc1f99146daefdfe77ab96e97dff9cbed6
Signed-off-by: Odelu Kukatla <okukatla@codeaurora.org>