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Fix ucm HW ports
Add soft mixer option
Remove >2 channel support until upstream

These lost analog-mono support when we made that a fallback profile, as
the stereo-fallback would be picked up as the only input profile, and
that does not work in duplex mode.

Fixes: pulseaudio/pulseaudio#750

We have a requirement to "hide" some hardware drivers, because
other (main) UCM configuration will refer them.

This patch use special error codes to notify the upper layers
to skip the module loading.

BugLink: https://github.com/alsa-project/alsa-ucm-conf/issues/30Signed-off-by: Jaroslav Kysela <perex@perex.cz>

Fix the check for a digit by checking if the value is between the
*character* '0' (not *value* 0) and '9'.

Also install the profile sets and paths from pulseaudio.
Make the path and profile directory configurable
Make the library static.