msm: kgsl: Add support for GMU log streaming

The GMU streams events to the host by sending an HFI message
on the f2h debug queue. These messages will be processed by
by the f2h daemon. The HFI interrupt handler will add these
packets to a secondary list, not the primary list into which
the more time critical TS_RETIRE and other messages go.
The f2h daemon first processes packets on the main list
and then the ones on the secondary list to avoid delaying
the time critical packets. It then reads the events from the
GMU log in memory and writes them out to ftrace.

Change-Id: I3f6cc13f39c2a60d24f2b92c4a97bacef8036f85
Signed-off-by: Sushmita Susheelendra <ssusheel@codeaurora.org>