Merge git://git.denx.de/u-boot-uniphier

- Add workaround code to make LD20 SoC boot from ARM Trusted Firmware
- Sync DT with Linux to fix DTC warnings
- Add new SoC support code
- Misc fix, updates

ARM: uniphier: add more init code for PXs3

Add the boot device table and reset deassertion for eMMC.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>