Merge tag 'renesas-dt-bindings-for-v4.21' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/dt

Renesas ARM Based SoC DT Bindings Updates for v4.21

* Move 'renesas,prr' binding to its own document
  - Prepration for converting board-level bindings to json-schema

* Document iW-RainboW-G20D-Qseven-RZG1N board and iWave RZ/G1N SOM

* tag 'renesas-dt-bindings-for-v4.21' of https://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  dt-bindings: arm: renesas: Move 'renesas,prr' binding to its own doc
  dt-bindings: arm: renesas: Document iW-RainboW-G20D-Qseven-RZG1N board
  dt-bindings: arm: renesas: Document iWave RZ/G1N SOM
Signed-off-by: Olof Johansson <olof@lixom.net>