Integrate linux-imx-kuk/pi4io_add_irq
Commit: seco-ne/kernel/linux-imx-kuk@a616d5ef
driver:pi4io: Edited some comments and small clean-up
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Commit: seco-ne/kernel/linux-imx-kuk@46be5d86
dts:mc3: Added interrupt controller to GPIO-Expander
BCS 746-001420
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Commit: seco-ne/kernel/linux-imx-kuk@eae8ce27
driver:pi4io: Added IRQ support
BCS 746-001420