msm: kgsl: Add support for Adaptive Clock Distribution

Adaptive Clock Distribution (ACD) is a power feature that
mitigates voltage droops. ACD involves interactions
between the host, the GMU, and the AOP.

Change-Id: Ibffa62a0858ca9dabac4d5b382ad2b8a3167789e
Signed-off-by: Kyle Piefer <kpiefer@codeaurora.org>