Nvidia hdmi audio fixes

Here is a set of backports from: https://github.com/skeggsb/nouveau which fix HDMI audio and interlaced modes not working on various laptops with nvidia graphics, including the Lenovo P1 Gen 2 which will offer an option to ship with Fedora pre-installed.

I've already done a koji scratch-build with these patches and Lenovo has confirmed that these fix the issue on the P1 Gen 2. This build has also been confirmed to fix HDMI audio on some Dell models.

These patches are currently queued upstream for merging during the 5.8 cycle.

This fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1818129 https://bugzilla.redhat.com/show_bug.cgi?id=1835865