perf cs-etm: Create decoders after both AUX and HW_ID search passes

Both of these passes gather information about how to create the
decoders. AUX records determine formatted/unformatted, and the HW_IDs
determine the traceID/metadata mappings.

Therefore it makes sense to cache the information and wait until both
passes are over until creating the decoders, rather than creating them
at the first HW_ID found.

This will allow a simplification of the creation process where
cs_etm_queue->traceid_list will exclusively used to create the decoders,
rather than the current two methods depending on whether the trace is
formatted or not.

Previously the sample CPU from the AUX record was used to initialize
the decoder CPU, but actually sample CPU == AUX queue index in per-CPU
mode, so saving the sample CPU isn't required.

Similarly formatted/unformatted was used upfront to create the decoders,
but now it's cached until later.

Reviewed-by: Anshuman Khandual <[email protected]>
Reviewed-by: Mike Leach <[email protected]>
Signed-off-by: James Clark <[email protected]>
Signed-off-by: James Clark <[email protected]>
Tested-by: Ganapatrao Kulkarni <[email protected]>
Tested-by: Leo Yan <[email protected]>
Acked-by: Suzuki Poulouse <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Alexandre Torgue <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: John Garry <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Leo Yan <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Maxime Coquelin <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Will Deacon <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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