candidates for @devel-rt localversion-rt++

[Mike Galbraith]

1. arm64/acpi/perf: move pmu allocation to an early CPU up hook
2. sched: Introduce raw_cond_resched_lock()
3. arm, KVM: convert vgic_irq.irq_lock to raw_spinlock_t

With these applied, 4 socket TaiShan 2280 box boots shiny new -rt11
gripe free, and has been tossed into SUSE's kvm build-bot slave pit,
where it is presumably performing acceptably, given its boss keeps
giving it more work to do.  (I see only lack of smoke/flame)

1 should fly, 2 and 3 may well die.. as box does without them.

	-Mike