main/postmarketos-base-downstream: enable msm-modem-downstream openrc service on post-install

Moved from the now removed msm-modem, see HEAD~.

Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/7677>

main/postmarketos-base-downstream/APKBUILD

@@ -1,14 +1,16 @@
 maintainer="Henrik Grimler <henrik@grimler.se>"
 pkgname=postmarketos-base-downstream
 pkgver=2
-pkgrel=2
+pkgrel=1
 pkgdesc="Base package for devices with downstream (vendor) kernels"
 url="https://postmarketos.org"
 arch="noarch"
 license="GPL-3.0-or-later"
+install="$pkgname-msm-modem-openrc.post-install"
 subpackages="
 	$pkgname-disable-udev-v4l:disable_udev_v4l
 	$pkgname-lightdm
+	$pkgname-msm-modem-openrc:msm_modem_openrc
 "
 source="10-logind-check-graphical.conf"
 
@@ -32,6 +34,12 @@ lightdm() {
 		-t "$subpkgdir"/usr/share/lightdm/lightdm.conf.d
 }
 
+msm_modem_openrc() {
+	default_openrc
+	install_if="$pkgname=$pkgver-r$pkgrel openrc msm-modem"
+	mkdir -p "$subpkgdir"
+}
+
 sha512sums="
 00addbea452dd3e2cb90e18793becc47d22118e6b99a79b76eb57db02aa8b00b133569beaea81cce4b39c9e556280c1d6ac8ab687016354e2d189734e38768cf  10-logind-check-graphical.conf
 "

main/postmarketos-base-downstream/postmarketos-base-downstream-msm-modem-openrc.post-install

@@ -0,0 +1,2 @@
+#!/bin/sh
+rc-update add msm-modem-downstream