UniPhier ARM SoC DT updates for v4.13
- fix W=1 build warnings
- use SPDX License Identifier
- add generic compatible string for I2C EEPROM
* tag 'uniphier-dt-v4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-uniphier:
ARM: dts: uniphier: Add generic compatible string for I2C EEPROM
ARM: dts: uniphier: use SPDX-License-Identifier
ARM: dts: uniphier: fix simple-bus unit address format error
ARM: dts: uniphier: Use - instead of @ for DT OPP entries
Signed-off-by: Olof Johansson <olof@lixom.net>