uboot-phytec

Merge tag 'u-boot-amlogic-20190531' of git://git.denx.de/u-boot-amlogic

- Sync DT with Linux 5.2-rc1 for G12A
- Add USB clock support that was introduced in 5.2-rc1 bindings
- Add currently in-review for Linux eMMC & USB DT for G12A in -u-boot.dtsi
- Fix PHY routing to external PHY when chainloading from a misconfigred bootloader
- Remove useless PHY GPIO reset from q200 board file
- Enable USB support for Amlogic U200 reference board