staging: vt6656: mac80211 conversion: add channel bands

Add rates and channels according to rf type for vnt_init_bands which is
a mac80211 replacement for CHvInitChannelTable.

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