media: meson-ir-tx: Convert to use devm_rc_register_device()

With that the remove callback can go away and also setting driver data
becomes superfluous.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>