Staging: wlan-ng: prism2_usb.c always enable the card in probe_usb

always enable card in probe_usb
& update register_wlandev to match latest wlan-ng-dev tree.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>