"mediatek,mt2701-sysirq", "mediatek,mt6577-sysirq": for MT2701
- interrupt-controller : Identifies the node as an interrupt controller
- #interrupt-cells : Use the same format as specified by GIC in arm,gic.txt.
-- interrupt-parent: phandle of irq parent for sysirq. The parent must
- use the same interrupt-cells format as GIC.
- reg: Physical base address of the intpol registers and length of memory
mapped region. Could be multiple bases here. Ex: mt6797 needs 2 reg, others
need 1.