[media] DVB: IR support for TechnoTrend CT-3650

Based on Waling Dijkstra's discovery that the IR works the same as
on the TT-1500, this patch has been rewritten to fit with the
rc_core infrastructure.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>