Merge tag 'u-boot-imx-20211022' of https://gitlab.denx.de/u-boot/custodians/u-boot-imx

u-boot-imx-20211022
-------------------

CI: https://source.denx.de/u-boot/custodians/u-boot-imx/-/pipelines/9561

- i.MX8:
	- Toradex Verdin (switch to binman, cleanup, etc.)
	- Phytec phycore_imx8mm (fixes, boot from SPI-NOR)
	- fixes for imx8mp_evk
- doc (i.MX): MX8MM with Fast boot
- i.MX6:
	- Toradex : colibri-imx6ull with eMMC, fixes
- i.MX7ULP :
	- preparation for OPTEE + Serial Number
- generic:
	- imx8m_image: Support ddr3 firmware