device-realme-x3: add nonfree-fw-openrc subpkg

This should make it possible to build systemd images for this device. I
don't know if anyone cares, but I couldn't look away when I found this
until I fixed it :D

Part-of: https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/6476

device/testing/device-realme-x3/APKBUILD

@@ -4,7 +4,7 @@
 pkgname=device-realme-x3
 pkgdesc="Realme X3"
 pkgver=1
-pkgrel=0
+pkgrel=1
 url="https://postmarketos.org"
 license="MIT"
 arch="aarch64"
@@ -28,6 +28,7 @@ source="
 
 subpackages="
 	$pkgname-nonfree-firmware:nonfree_firmware
+	$pkgname-nonfree-firmware-openrc:nonfree_firmware_openrc
 	$pkgname-alsa_ucm_conf
 	$pkgname-wireplumber
 "
@@ -46,19 +47,27 @@ nonfree_firmware() {
 		firmware-realme-x3
 		msm-modem
 		pd-mapper
-		pd-mapper-openrc
 		tqftpserv
-		tqftpserv-openrc
 		bootmac
 		alsa-utils
 		"
-	install="$subpkgname.post-install"
-	mkdir "$subpkgdir"
 
 	install -Dm644 "$srcdir/30-gpu-firmware.files" \
 		 "$subpkgdir/usr/share/mkinitfs/files/30-gpu-firmware.files"
 }
 
+nonfree_firmware_openrc() {
+	install_if="$pkgname-nonfree-firmware=$pkgver-r$pkgrel openrc"
+	install="$subpkgname.post-install"
+	depends="
+		openrc
+		pd-mapper-openrc
+		tqftpserv-openrc
+	"
+
+	mkdir -p "$subpkgdir"
+}
+
 alsa_ucm_conf() {
 	install -Dm644 "$srcdir/HiFi.conf" \
 		"$subpkgdir/usr/share/alsa/ucm2/Realme/x3/HiFi.conf"