dt-bindings: usb: usb-device: fix typo in required properties

Fix typo in 'compatible' property name.

Signed-off-by: Mans Rullgard <mans@mansr.com>
Link: https://lore.kernel.org/r/20210209181240.28017-1-mans@mansr.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>