main/postmarketos-base: use setup-devd (MR 3302)

Alpine does not use setup-udev anymore and provides the same
functionality through setup-devd. The setup-udev script was deleted [1]
but postmarketos-base still used it and caused pmbootstrap to fail when
building a device image. Use the rc-service setup directly from
setup-devd.

[1] https://gitlab.alpinelinux.org/alpine/aports/-/commit/b56c4c2b9ddea6007c5e4349f97310a1538f29b6

main/postmarketos-base/APKBUILD

 pkgname=postmarketos-base
-pkgver=20
-pkgrel=2
+pkgver=21
+pkgrel=0
 pkgdesc="Meta package for minimal postmarketOS base"
 url="https://postmarketos.org"
 arch="noarch"

main/postmarketos-base/postmarketos-base.post-install

 #!/bin/sh -e
 
-# Enable udev OpenRC services and runlevels
-# https://github.com/alpinelinux/aports/blob/master/main/eudev/setup-udev
-setup-udev -n
+# Enable eudev service
+rc-update add udev sysinit
+rc-update add udev-trigger sysinit
+rc-update add udev-settle sysinit
+rc-update add udev-postmount default
 
 # Enable other OpenRC services
 for service in devfs dmesg; do