Merge tag 'u-boot-imx-20191228' of https://gitlab.denx.de/u-boot/custodians/u-boot-imx

Fixes for 2020.01
-----------------
- Fixes for Nitrogen6x
- Fix corruption for mx51evk
- colibri i.MX6: fix broken ESDHC conversion
- mx6sxsabresd: fix broken mmcdev
- imx6q_logic: cleanup boot sequence
- update ATF for imx8mq_evk
- pfuze: fix pmic_get()

Travis CI: https://travis-ci.org/sbabic/u-boot-imx/builds/630007464