Staging: rt2870: new USB ID for Belkin N+ F5D8055

New USB ID for Belkin N+ F5D8055 (USB 802.11n adapter).

I've made this patch with drivers/staging branch found here:
http://git.kernel.org/?p=linux/kernel/git/gregkh/staging-2.6.git



Signed-off-by: Daniele Napolitano <dnax88@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>