This makes it easier to scan. The sorting is done based on the text
that appears in the HTML, not the :ref: label name.
In the case of the DMIC API, change the title of the document to match
the "Audio Codec" document so we can keep those together.
Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
Now there's an audio reference section move the i2s docs there
as the audio section is a better fit.
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>