alsa-mixer: Set the intended-role of Steelseries Arctis 5/7 headset as phone

Fixes: pulseaudio/pulseaudio#640

src/modules/alsa/mixer/profile-sets/steelseries-arctis-common-usb-audio.conf

@@ -7,6 +7,7 @@ device-strings = hw:%f,0,0
 channel-map = left,right
 paths-input = analog-input-mic
 paths-output = steelseries-arctis-output-chat-common
+intended-roles = phone
 
 [Mapping analog-game]
 description = Game

src/modules/alsa/mixer/profile-sets/usb-gaming-headset.conf

@@ -34,6 +34,7 @@ device-strings = hw:%f,0,0
 channel-map = mono
 paths-output = usb-gaming-headset-output-mono
 paths-input = usb-gaming-headset-input
+intended-roles = phone
 
 [Mapping analog-stereo]
 device-strings = hw:%f,1,0