Add ivsc-firmware to ipu6 option

[bubuntux]

Description of changes

ivcs firmware is needed for some ipu6 webcams (reading some threads seems like mostly dells) and looking into the documentation for https://github.com/intel/ipu6-drivers seems like ivsc firmware is need it

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.05 Release Notes (or backporting 23.05 and 23.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[bubuntux]

related to #295508 cc @Mic92

[adminy]

Quick question, should this: https://github.com/bubuntux/nixpkgs/blob/811872a489f6ca41809f16a6032658894edf53c2/nixos/modules/hardware/video/webcam/ipu6.nix#L28-L32

have an extra one called v4l2loopback ?

[bubuntux]

at least on my system doesn't seems like is need it to get the webcam working

[adminy]

Got it, thanks.