staging: vt6655: mac80211 conversion: changes to device_intr

Remove net device code.

Remove current measure code and function s_vCompleteCurrentMeasure
and switch code which are now handled by mac80211

Change beaconing to mac80211.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>