For the usbhost device tree set the default backlight brightness to 0

2 jobs for imx8-4.18-wip in 39 minutes and 42 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #10540
librem5
build:aarch64:Image

00:39:42

passed #10541
librem5
build:aarch64:deb

00:26:18