conf/ucm: bytcr-rt5640: Improve human readable input/output names

conf/ucm: bytcr-rt5640: Improve human readable input/output names

The Comment field is displayed tot the end user in various UIs as such
names like MonoSpeaker and DigitalMics without any spaces are no good.

Also the names themselves as well as how they get displayed in the
typical UI (in separate input / output tabs) makes the adding of
playback and capture to the comment superfluous and this looks weird
in the UI, so drop it.

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>