USB: serial: ftdi additional IDs

I tested this against 2.6.39 in the Ubuntu kernel, however I see the IDs
are not in latest 3.2 git.

This adds IDs for the FTDI controller in the Rainforest Automation
Zigbee dongle.

Signed-off-by: Peter Naulls <peter@chocky.org>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>