arm64: dts: imx8mq-librem5: add the dwc3 phy

Add the phy so that it can be notified of usb changes

Signed-off-by: Angus Ainslie <angus@akkea.ca>
2 jobs for bc12 in 62 minutes and 27 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed #318084
librem5
build:aarch64

00:20:35

passed #318085
librem5:arm64
build:deb

01:02:27