Merge tag 'renesas-soc-for-v3.13' into dt2-base

Renesas ARM based SoC updates for v3.13

* Add support for r8a7791 SoC
* Rename DU device in clock lookups list of r8a7779 SoC
* USB and SSI/SRU clock support for r8a7778 SoC
* USB phy power control function support for r8a7778 SoC