Revert "alsa-firmware: 1.2.1 -> 1.2.4"
Revert "alsa-firmware: 1.2.1 -> 1.2.4"

This was pushed to master without a PR and broke cross compilation of a
small cross-NixOS:

```
configure: error: in `/build/alsa-firmware-1.2.4':
configure: error: C compiler cannot create executables
See `config.log' for more details
```

Let's re-roll this in a PR.

This reverts commit 72f71e907135f250b656090eeb70d9f95f8e653d.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs