genirq: axxia: Fix irq_set_affinity to allow use with buslocks

commit  7c90a4516c803d5151b09d14e92a29788b7be5d1 from
https://github.com/axxia/linux-yocto.git

 v5.10/standard/preempt-rt/axxia-dev/base

Modify irq_set_affinity() to allow usage of bus locks with "slow bus" IRQ
controllers. This only affects those BSPs that use bus locks in their IRQ
controllers, such as the Intel Axxia GIC. The recommendation for this
change originated from Thomax Gleixner at Linutronix.

Signed-off-by: David Mercado <david.mercado@windriver.com>
Signed-off-by: John Jacques <john.jacques@intel.com>
Signed-off-by: Charlie Paul <charlie.paul@windriver.com>
Signed-off-by: Daniel Dragomir <daniel.dragomir@windriver.com>
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>