V4L/DVB (5956): Add remote control support for the Hauppauge Nova-T 500

This patch adds remote control support for the Hauppauge Nova-T 500 
using the same keys as for STK7700PD.

Signed-off-by: Janne Grunau <janne-dvb@grunau.be>
Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>