board/udoo/mx6qdl: disable usb host in device tree

board/udoo/mx6qdl: disable usb host in device tree

After BSP update Udoo Quad/Dual board once again hangs on boot. On a
new kernel disabling CONFIG_USB option is not enough to work around
the troublesome usb host on Udoo Quad/Dual board. So in order to be
future-proof it makes sense to disable usbh1 block in device tree
rather than fine-tune kernel configuration after BSP updates.

Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>