With recent kernel versions, the "deadline" I/O scheduler has been replaced with "mq-deadline", and the "elevator" kernel command line option has been deprecated in general with Linux 5.4: https://kernelnewbies.org/Linux_5.4?highlight=%28elevator%29#Block_layer
Signed-off-by: MichaIng <micha@dietpi.com>
The example for enabling IR transmission in `/boot/config.txt` is still using the deprecated `lirc-rpi` overlay.
The documentation in `/boot/overlays/README` indicates that this overlay has been deprecated in favor of `gpio-ir` / `gpio-ir-tx`.
This updates the actual config.txt to suggest `gpio-ir` instead of `lirc-rpi`.
