drivers/perf: hisi: Add support for HiSilicon MN PMU driver

MN (Miscellaneous Node) is a hybrid node in ARM CHI. It broadcasts the
following two types of requests: DVM operations and PCIe configuration.
MN PMU devices exist on both SCCL and SICL, so we named the MN pmu
driver after SCL (Super cluster) ID.
The MN PMU driver using the HiSilicon uncore PMU framework. And only
the event parameter is supported.

Signed-off-by: Junhao He <hejunhao3@huawei.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Will Deacon <will@kernel.org>