uboot-phytec

Merge tag 'u-boot-clk-23Oct2019' of https://gitlab.denx.de/u-boot/custodians/u-boot-clk

- Add I2C clocks for i.MX6Q CCF driver
- Fix check in clk_set_default_parents()
- Managed API to get clock from device tree
- Fixes for core clock code (including sandbox regression tests)