main/postmarketos-base: drop eudev-setup

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. Setup eudev rc-services directly instead.

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