Revert "perf parse-events: Prefer sysfs/JSON hardware events over legacy"

This reverts commit 617824a7f0f73e4de325cf8add58e55b28c12493.

This made a simple 'perf record -e cycles:pp make -j199' stop working on
the Ampere ARM64 system Linus uses to test ARM64 kernels, as discussed
at length in the threads in the Link tags below.

The fix provided by Ian wasn't acceptable and work to fix this will take
time we don't have at this point, so lets revert this and work on it on
the next devel cycle.

Reported-by: Linus Torvalds <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Bhaskar Chowdhury <[email protected]>
Cc: Ethan Adams <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kan Liang <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Thomas Richter <[email protected]>
Cc: Tycho Andersen <[email protected]>
Cc: Yang Jihong <[email protected]>
Link: https://lore.kernel.org/lkml/CAHk-=wi5Ri=yR2jBVk-4HzTzpoAWOgstr1LEvg_-OXtJvXXJOA@mail.gmail.com
Link: https://lore.kernel.org/lkml/CAHk-=wiWvtFyedDNpoV7a8Fq_FpbB+F5KmWK2xPY3QoYseOf_A@mail.gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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