at76c50x-usb: Add device ID for OQO model 01+

Add USB device ID for OQO 01+'s internal wireless LAN

An OQO employee mentions the chip's true identity here:-
    ftp://ftp.oqo.com/unsupported/linux/OQOLinux.html



Signed-off-by: Jamie Lentin <jm@lentin.co.uk>
Acked-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>