USB: ati_remote2: Add channel support

Add logical channel support for ATI Remote Wonder II

The ATI Remote Wonder II can be configured with one of 16 unique logical
channels. Allowing up to 16 remotes to be used independently within
range of each other. This change adds functionality to configure the
receiver and filter the input data to respond or exclude remotes
configured with different logical channels.

Signed-off-by: Peter Stokes <linux@dadeos.freeserve.co.uk>
Acked-by: Ville Syrjala <syrjala@sci.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>