[media] rc-core: fix input repeat handling

The call to input_register_device() needs to take place
before the repeat parameters are set or the input subsystem
repeat handling will be disabled (as was already noted in
the comments in that function).

Cc: stable <stable@vger.kernel.org> # v4.11
Signed-off-by: David Härdeman <david@hardeman.nu>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>