[media] cx231xx: Add support for Hauppauge WinTV USB2-FM

This patch adds support for the "Hauppauge WinTV USB2-FM" Analog TV Stick.
It includes support for both the PAL and NTSC variants of the device.

Signed-off-by: Peter Moon <pomoon@gmail.com>
Reviewed-by: Devin Heitmueller <dheitmueller@hauppauge.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>