msm: ais: add ais_tracing_mark_write for systrace

Add ais_tracing mark_write, a mechanism like UMD.
If some sequence needs to be showed on systrace HTML,
add AIS_ATRACE_BEGIN and AIS_ATRACE_END pair.

Change-Id: Idcbed2036000cd71dd083fdafa5c432b4bf6d235
Signed-off-by: Chunhuan Zhan <zhanc@codeaurora.org>