staging: vt6655: set_channel replace parameter with ieee80211_channel

replacing uConnectionChannel for hw_value as set in vnt_init_bands.

This allows other signaling of ieee80211_channel to move deeper into
driver.

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