soc-qcom-sdm845: fix post upgrade (MR 4154)

The call_audio_idle_suspend_workaround init service was moved to the
-pulseaudio subpackage, but the -modem subpackage still had a
.post-upgrade referring to it. This moves that to the (recently) new
-pulseaudio package

[ci:skip-build]: already built successfully in CI

device/community/soc-qcom-sdm845/APKBUILD

@@ -3,7 +3,7 @@
 pkgname=soc-qcom-sdm845
 pkgdesc="Common package for Qualcomm SDM845 devices"
 pkgver=15
-pkgrel=0
+pkgrel=1
 url="https://postmarketos.org"
 license="BSD-3-Clause"
 arch="aarch64"
@@ -101,6 +101,7 @@ vulkan() {
 pulseaudio() {
 	install_if="$pkgname=$pkgver-r$pkgrel pulseaudio"
 	replaces="$pkgname" # To migrate from workaround being in main package
+	install="$subpkgname.post-upgrade"
 
 	# Call Audio idle suspend workaround code
 	install -Dm755 "$srcdir"/call_audio_idle_suspend_workaround.sh \

device/community/soc-qcom-sdm845/soc-qcom-sdm845-modem.post-install

@@ -1,3 +1,2 @@
 #!/bin/sh
 rc-update add q6voiced default
-rc-update add call_audio_idle_suspend_workaround default

device/community/soc-qcom-sdm845/soc-qcom-sdm845-pulseaudio.post-upgrade

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+rc-update add call_audio_idle_suspend_workaround default