perf cs-etm: Make cs_etm__run_decoder() queue independent

perf cs-etm: Make cs_etm__run_decoder() queue independent

This patch makes decoding of auxtrace buffer centered around a struct
cs_etm_queue.  This eliminates surperflous variables and is a precursor
for work that simplifies the main decoder loop.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki K Poulouse <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190212171618.25355-11-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>