[media] rc: add driver for IR remote receiver on MT7623 SoC

This patch adds driver for IR controller on MT7623 SoC.
and should also work on similar Mediatek SoC. Currently
testing successfully on NEC and SONY remote controller
only but it should work on others (lirc, rc-5 and rc-6).

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>