BACKPORT: arm64: perf: Support new DT compatibles

Add support for matching the new PMUs. For now, this just wires them up
as generic PMUv3 such that people writing DTs for new SoCs can do the
right thing, and at least have architectural and raw events be usable.
We can come back and fill in event maps for sysfs and/or perf tools at
a later date.

Change-Id: I0c0839f6fff87934e97708176f783514bdee7f58
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
(cherry picked from commit 29cc4ceeac1274ab8363a11b81ebd99f3b023985
 git://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git for-next/perf)

Bug: 176519087
Link: https://lore.kernel.org/linux-arm-kernel/20200225190125.GA2781@bogus/T/#mdaa003324f263cc9541d412f7ba6b9519d6603fe


Signed-off-by: Chun-Hung Wu <chun-hung.wu@mediatek.com>
Change-Id: I335d4c9a9bfcfcfeb18b096cfe660209d3b62820