feat(tc): add dts entries for MCN PMU nodes

TC3 has 4 MCN instances, each of them have PMU registers to count
different MCN cache access events, add entries for MCN PMU so that Linux
MCN PMU perf driver can be used with perf.

Change-Id: I7e0ac5025231c3f19d5291292d4cae186accc544
Signed-off-by: Jagdish Gediya <jagdish.gediya@arm.com>
Signed-off-by: Leo Yan <leo.yan@arm.com>
2 files changed