pulseaudio: Adjust to upstream kernel name

MODEM is now Modem
3 jobs for snd-byz in 3 minutes and 56 seconds (queued for 1 second)
Status Job ID Name Coverage
  Package
passed #326650
librem5
package:deb-debian

00:00:46

 
  Test Package
passed #326651
librem5
autopkgtest-debian-package

00:03:10

passed #326652
librem5
lintian-debian-package

00:00:31