perf cpumap: Drop in cpu_aggr_map struct

Replace usages of perf_cpu_map with cpu_aggr map in places that are
involved with 'perf stat' aggregation.

This will then later be changed to be a map of cpu_aggr_id rather than
an int so that more data can be stored.

No functional changes.

Signed-off-by: James Clark <james.clark@arm.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: John Garry <john.garry@huawei.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Link: https://lore.kernel.org/r/20201126141328.6509-7-james.clark@arm.com


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