perf vendor events arm64: Reference common and uarch events for Ampere eMag

perf vendor events arm64: Reference common and uarch events for Ampere eMag

Reduce duplication in the JSONs by referencing standard events from
armv8-common-and-microarch.json

In general the "PublicDescription" fields are not modified when somewhat
significantly worded differently than the standard.

Apart from that, description and names for events slightly different to
standard are changed (to standard) for consistency.

Note that names for events 0x34 and 0x35 are non-standard and remain
unchanged. Those events came from the following originally:

  https://github.com/AmpereComputing/ampere-centos-kernel/blob/4c2479c67bbcf35b35224db12a092b33682b181c/Documentation/arm64/eMAG-ARM-CoreImpDefined.pdf

Signed-off-by: John Garry <john.garry@huawei.com>
Acked-by: Will Deacon <will@kernel.org>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Nakamura, Shunsuke/中村 俊介 <nakamura.shun@fujitsu.com>
Cc: mathieu.poirier@linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linuxarm@openeuler.org
Link: https://lore.kernel.org/r/1611835236-34696-4-git-send-email-john.garry@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>