So far we had separate media types for different DAC cable lengths,
equal to how the SDK defines them. However, this seems overengineered.
The types '_50CM' and '_100CM' are always treated equally, same for
'_300CM' and '_500CM'. Not only in the RTL931x code, but also the
RTL930x code usually just makes a distinction between short and long.
Thus, make that a bit cleaner by reducing the DAC type set to '_SHORT'
and '_LONG' with DAC cables < 3m being considered short and those with
>= 3m being considered as long.
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22786
Signed-off-by: Robert Marko <robimarko@gmail.com>
7c7058b66b