arm_pmu: acpi: spe: Add initial MADT/SPE probing

mainline inclusion
from mainline-5.3-rc1
commit d24a0c70
category: feature
bugzilla: 16072
CVE: NA
---------------------------

ACPI 6.3 adds additional fields to the MADT GICC
structure to describe SPE PPI's. We pick these out
of the cached reference to the madt_gicc structure
similarly to the core PMU code. We then create a platform
device referring to the IRQ and let the user/module loader
decide whether to load the SPE driver.

Tested-by: Hanjun Gou <gouhanjun@huawei.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Hongbo Yao <yaohongbo@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>