media: rc: add Beelink Mini MXIII keymap

Add a keymap for the simple IR (NEC) remote used with the Beelink
Mini MXIII Android STB device.

Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>