Comment # 2 on bug 1176351 from Takashi Iwai

Did you install sof-firmware package as well as alsa-ucm-conf package?
The error message indicates at least the lack of the former.  The SOF should
work once after installing those missing pieces.  The workaround skips the SOF,
and directly driving the HD-audio legacy stuff.  The drawback is that you have
no built-in mic, as the digital mic isn't handled via HD-audio bus.

BTW, your suggested workaround was a deprecated option for old kernels.  For
the recent kernels, it's snd-intel-dspcfg.dsp_driver=1.