Merge tag 'pxa-dt-4.20' of https://github.com/rjarzmik/linux into next/dt

This device-tree pxa update brings :
 - a couple of changes for future pxa2xx platforms
  - 2 fixes in RTC and I2C domain

* tag 'pxa-dt-4.20' of https://github.com/rjarzmik/linux

:
  ARM: dts: pxa: add pincontrol helpers
  ARM: dts: pxa: fix power i2c base address
  ARM: dts: pxa: fix the rtc controller
  ARM: dts: pxa: change serial node names

Signed-off-by: Arnd Bergmann <arnd@arndb.de>