perf arm-spe: Synthesize SPE instruction events

Synthesize instruction events for every ARM SPE record.

Arm SPE implements a hardware-based sample period, and perf implements a
software-based one. Add a warning message to inform the user of this.

Signed-off-by: German Gomez <[email protected]>
Tested-by: Leo Yan <[email protected]>
Acked-by: Namhyung Kim <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: John Garry <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Mathieu Poirier <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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