Merge tag 'v3.20-next-dts' of https://github.com/mbgg/linux-mediatek into next/dt

Merge "ARM: mediatek: DT changes for v3.20 (round 1)" from Matthias Brugger:

This adds support for the mediatek sysirq and the uarts for the following SoCs:
- mt8135
- mt8127
- mt6598

For mt6592 only the sysirq support was added.

* tag 'v3.20-next-dts' of https://github.com/mbgg/linux-mediatek:
  ARM: mediatek: dts: Add uart to Aquaris5
  ARM: mediatek: dts: Add uart to mt6589
  dt-bindings: add mt6592 compatible string for mediatek sysirq
  ARM: mediatek: Add sysirq device node to mt6592 dtsi
  ARM: mediatek: dts: Add UART dts for MT8127 and MT8135 boards
  DTS: serial: Add bindings document for the Mediatek UARTs
  ARM: mediatek: add UART dts for mt8127 and mt8135
  ARM: mediatek: Add sysirq in mt6589/mt8135/mt8127 dtsi

Signed-off-by: Olof Johansson <olof@lixom.net>