linux-phytec-ti

uwb: Orphan the UWB and WUSB subsystems

I'm no longer in a position to be the maintainer for the Ultra-Wide
Band (UWB) and Ceritified Wireless USB (WUSB) subsystems and no one else
has volunteered to take over.

Signed-off-by: David Vrabel <david.vrabel@csr.com>