UPSTREAM: perf/arm-cmn: Demarcate CMN-600 specifics

In preparation for supporting newer CMN products, let's introduce a
means to differentiate the features and events which are specific to a
particular IP from those which remain common to the whole family. The
newer designs have also smoothed off some of the rough edges in terms
of discoverability, so separate out the parts of the flow which have
effectively now become CMN-600 quirks.

Bug: 247832918
Change-Id: I9edef7352568289f24f978f0730488d49d3371f0
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/9f6368cdca4c821d801138939508a5bba54ccabb.1638530442.git.robin.murphy@arm.com


Signed-off-by: Will Deacon <will@kernel.org>
(cherry picked from commit 61ec1d87)
Signed-off-by: Robin Peng <robinpeng@google.com>