msm: kgsl: Add support for Limits Management on A640

For Limits Management (LM) to be enabled on A640, the
feature control HFI message for LM must be sent to the GMU.
Additionally, the throttled cycles must be taken into
account for DCVS.

Change-Id: Ib6520a4bb211db2ffc0ac66d88acdad545c1303a
Signed-off-by: Kyle Piefer <kpiefer@codeaurora.org>