New configuration for Audient EVO4

alsa-project/alsa-ucm-conf issue #303 was opened from mbainter:

I'd like to assemble a UCM2 configuration for the EVO4 similar to what is present for the id44. These are very similar, except the EVO has [two Mic preamps instead of just one](https://audient.com/id4-vs-evo4/). I am trying to build off of the id44 profile, but the docs are a bit thin.

If someone can help me work through this, I'd be happy to submit a PR with the configuration (which could then be a reasonable basis for the EVO8 and 16 as well, if anyone has those and wants to contribute).

Issue URL : https://github.com/alsa-project/alsa-ucm-conf/issues/303 Repository URL: https://github.com/alsa-project/alsa-ucm-conf