HID: usbhid: Share USB device firmware node with child HID device

USB HID core now shares its fwnode with its child HID device.
Since there can only be one HID device on a USB interface, it is redundant
to specify a hid node under the USB device. This allows usb HID device
drivers to be described in firmware and make use of device properties.

Signed-off-by: Danny Kaehn <danny.kaehn@plexus.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240605-cp2112-dt-v11-2-d55f0f945a62@plexus.com


Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>