alsa-* 1.2.6 breaks audio switching and microphones on several devices,
with some outstanding issues still open upstream.
This 'fork' is meant to be very short-lived, to restore audio on devices
while we figure out how to fix it on 1.2.6.
see: https://gitlab.com/postmarketOS/pmaports/-/issues/1334
This was only needed to load the ALSA PulseAudio plugin outside
the chroot when running QEMU. Now that we allow configuring the
QEMU PulseAudio backend directly this is no longer needed.