In heterogeneous systems, the number of counters may differ across
clusters. To find the number of counters for a cluster, we must probe
the PMU from a CPU in that cluster.
Reviewed-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NMark Rutland <mark.rutland@arm.com>
Signed-off-by: NWill Deacon <will.deacon@arm.com>