Audio not working on N900 (kernel regression?)

Created by: ollieparanoid

User fxkrait (@fxkrait?) reported in #postmarketOS, that Audio isn't working on the N900. I guess this could be a kernel regression, as it was clearly working before (#702).

@pavelmachek, @craftyguy, @MartijnBraam: Could you test if it works for you? @pavelmachek: do you know if it is a kernel regression? @fxkrait: you could check if it works with linux-postmarketos-stable instead of linux-postmarketos-mainline. Just replace it in the depends of aports/device/device-nokia-n900/APKBUILD, run pmbootstrap build device-nokia-n900 --force, zap your chroots and install again.