MAINTAINERS: Add hisilicon PMU JSON events under its entry

The all hisilicon PMU JSON events were missing to be listed there.

Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Junhao He <hejunhao3@huawei.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Yicong Yang <yangyicong@hisilicon.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20250418070812.3771441-4-hejunhao3@huawei.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>