pulseaudio points at 'dummy output' device, not beagle audio

[Steve Langasek]

on the ALIP desktop, pulseaudio appears not to detect the beagle audio device. It shows up fine in alsa:

# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: omap3beagle [omap3beagle], device 0: TWL4030 twl4030-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
#

This may be related to bug #712025; in the logs, I see:

Mar 3 20:28:29 linaro kernel: [ 1321.818420] asoc: interface omap-mcbsp-dai.1 hw params failed
[repeat x N]
Mar 3 20:28:29 linaro pulseaudio[1688]: module-alsa-card.c: Failed to find a working profile.
Mar 3 20:28:29 linaro pulseaudio[1688]: module.c: Failed to load module "module-alsa-card" (argument: "device_id="0" name="platform-soc-audio" card_name="alsa_card.platform-soc-audio" tsched=yes ignore_dB=no card_properties="module-udev-detect.discovered=1""): initialization failed.
Mar 3 20:28:29 linaro pulseaudio[1688]: module-udev-detect.c: Tried to configure /devices/platform/soc-audio/sound/card0 (alsa_card.platform-soc-audio) more often than 5 times in 10s