UR44: Add stereo inputs to the HiFi profile, relabel the inputs and outputs
I relabeled the 'line outs' as Mix 1 and 2, because that is what is accessible to a computer.
Mix 1 and 2 are not necessarily mapped to any output.
The inputs are named after where they are on the device (Front, Back)
The device is internally complex and needs quite a bit of reverse
engineering to fully expose its functionality on linux and will
need dedicated software to be written, but this at least makes
it usable on a basic level.
Closes: https://github.com/alsa-project/alsa-ucm-conf/pull/584 Signed-off-by: Petr Mrázek <peterix@gmail.com> Signed-off-by: Jaroslav Kysela <perex@perex.cz>