USB-Audio: UR24C - add Steinberg UR24C (USB0499:174d)

[GitHub pull_request - opened]

alsa-project/alsa-ucm-conf pull request #221 was opened from goremil:

[Yamaha Steinberg UR24C 2x4 USB 3.0 Audio Interface](https://www.steinberg.net/audio-interfaces/ur24c/)
[UR24C_Operation_Manual_English.pdf](https://download.steinberg.net/downloads_hardware/UR-C/Manuals/UR24C_Operation_Manual_English.pdf)

Add UCM2 profiles for UR24C (USB0499:174d):
1. Direct: 4.0 out (FL,FR,RL,RR) + 2.0 in (FL,FR)
2. HiFi: 2x stereo out (FL1,FR1,FL2,FR2) + 2x mono in (MONO1,MONO2)

[alsa-info.sh](https://alsa-project.org/db/?f=0c5414fb5d96287c51a6479b537123440f4b35b8)

Request URL   : https://github.com/alsa-project/alsa-ucm-conf/pull/221
Patch URL     : https://github.com/alsa-project/alsa-ucm-conf/pull/221.patch
Repository URL: https://github.com/alsa-project/alsa-ucm-conf