The recent change to turn off the IEC958 element for analog paths
exposed a bug in AC3 profiles. These were inheriting the analog output
path instead of explicitly selecting the iec958 path.
Thanks to David Henningsson for pointing this out.
[Mapping iec958-ac3-surround-40]
device-strings = a52:%f
channel-map = front-left,front-right,rear-left,rear-right
+paths-output = iec958-stereo-output
priority = 2
direction = output
[Mapping iec958-ac3-surround-51]
device-strings = a52:%f
channel-map = front-left,front-right,rear-left,rear-right,front-center,lfe
+paths-output = iec958-stereo-output
priority = 3
direction = output