msm: kgsl: Add support for kernel profiling in hw scheduler

Enable kernel command profiling by sending the HFI feature
flag to GMU. Add support for the sync event which maps GPU/GMU
ticks to ftrace time. Record the GPU ticks when command is
submitted to the HFI dispatch queue. The ticks corresponding to
submission to the ringbuffer, start, retire on GPU/GMU will be
conveyed to kgsl by GMU through the HFI retire packet.
Modify the trace events to log this information appropriately.

Change-Id: Ib6b5a7858848d8d409925015aad719322de8c12d
Signed-off-by: Sushmita Susheelendra <ssusheel@codeaurora.org>
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>