V4L/DVB (3617): Cxusb: add support for FusionHDTV USB portable remote control

- Added keycodes for the DViCO FusionHDTV portable remote control.
- Enabled the remote control for both versions of FusionHDTV DVB-T USB
  and the FusionHDTV 5 USB Gold (ATSC)

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>