diff -u -r -N old/debian/bluetooth-audio.conf new/debian/bluetooth-audio.conf
--- old/debian/bluetooth-audio.conf	1970-01-01 01:00:00.000000000 +0100
+++ new/debian/bluetooth-audio.conf	2018-01-30 06:52:54.857287104 +0100
@@ -0,0 +1 @@
+options ath9k btcoex_enable=1 bt_ant_diversity=1
diff -u -r -N old/debian/bluez.install new/debian/bluez.install
--- old/debian/bluez.install	2017-07-19 11:46:21.000000000 +0200
+++ new/debian/bluez.install	2018-01-30 06:53:47.255649429 +0100
@@ -42,3 +42,4 @@
 usr/share/man/man1/btattach.1
 usr/share/man/man8/bluetoothd.8
 debian/source_bluez.py usr/share/apport/package-hooks
+debian/bluetooth-audio.conf etc/modprobe.d/bluetooth-audio.conf