Merge tag 'u-boot-imx-20200121' of https://gitlab.denx.de/u-boot/custodians/u-boot-imx

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imx8: cleanup, fix warnings
imx6ull: add VisionSOM SoM and EVK
mx7ulp: fix warning due network, cleanup
mx7dsabre: Fix dm probe pmic
imx6: fixed for vining2000

Travis: https://travis-ci.org/sbabic/u-boot-imx/builds/639512296