mixer: Don't install smixer modules unless python is enabled
mixer: Don't install smixer modules unless python is enabled

Currently the whole smixer stuff depends on python, so it doesn't make
sense to install plugins partially when the python support is
disabled.

This patch changes Makefile.am not to install the smixer stuff at all
when the python support is disabled via configure script.

Signed-off-by: Takashi Iwai <4596b3305151c7ee743192a95d394341e3d3b644@suse.de>

alsa-project/alsa-lib,tiwai/alsa-lib,takaswie/alsa-lib,tiwai/alsa-lib,takaswie/alsa-lib,takaswie/alsa-lib,tiwai/alsa-lib,alsa-project/alsa-lib,tiwai/alsa-lib,takaswie/alsa-lib,alsa-project/alsa-lib,alsa-project/alsa-lib,takaswie/alsa-lib