media: arm64: dts: allwinner: beelink-gs1: Add rc-beelink-gs1 keymap

Beelink GS1 ships with a NEC remote control.

Add the rc keymap to the device-tree.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>