I didn't author this patch, just committing it. See below.

Co-authored-by: Patrick Wildt <patrick@blueri.se>

The LCDIF needs to be shut down in a particular way.
Disable display clocks, reset and power down mipi dsi.
Disable pwm and edp bridge.
Also stop USB in any case.

Linux kernel mode setting seems to fail to
properly reset the mipi core, causing the
screen to be shifted to the right.

As a work around, we reset the lcdif and
mipi core in a board_quiesce_devices()
function.

 - with our boot.scr this is a no-op because flash-kernel stores a
   symlink from /dtb-5.18.0-4-arm64 to /dtbs/${fk_kvers}/${fdtfile}
 - with extlinux.conf under debian-installer only sets fdtdir to /dtbs/
   and then expects u-boot to read /dtbs/freescale/imx8mq-mnt-reform2.dtb
 - without this patch, u-boot will try reading /dtbs/imx8mq-MNT Reform 2.0.dtb
   which doesn't exist

 - this partially reverts b3a8287b which prevented BOOTENV as set by
   config_distro_boot.h being appended to CONFIG_EXTRA_ENV_SETTINGS
 - distro_bootcmd can do everything the nested loop can do:
     * boot from usb
     * arbitrary boot order
     * set arbitrary boot partition
     * search arbitrary list of prefixes
     * load a boot.scr
 - in addition to that, distro_bootcmd:
     * is the standard boot mechanism for distros (see doc/README.distro)
     * thus we can replace hard-to-read custom code
     * works with extlinux.conf (needed for debian-installer)

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

This lets the USB gadget connect faster. Before the ether gadget
was timing out.

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>

Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>