perf top: Move sb_evlist to 'struct perf_top'

[ Upstream commit ca6c9c8b ]

Where state related to a 'perf top' session is grouped.

Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Link: http://lore.kernel.org/lkml/20200429131106.27974-3-acme@kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Stable-dep-of: 9c51f878 ("perf env: Avoid recursively taking env->bpf_progs.lock")
Signed-off-by: Sasha Levin <sashal@kernel.org>