msm: kgsl: add ftrace for cache operations

Add the event kgsl_mem_sync_cache. This event is
emitted when only a cache operation is actually
performed. Attempts to flush uncached memory,
which do nothing, do not cause this event.

Change-Id: Id4a940a6b50e08b54fbef0025c4b8aaa71641462
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>
2 files changed