Revert commits towards #152864 made so far. We'll pick it up again after the 0.10...

Revert commits towards #152864 made so far. We'll pick it up again after the 0.10.13 release.

Original commit message from CVS:
* ext/alsa/gstalsamixer.c: (gst_alsa_mixer_ensure_track_list),
(gst_alsa_mixer_free), (gst_alsa_mixer_update),
(gst_alsa_mixer_get_volume), (gst_alsa_mixer_set_volume),
(gst_alsa_mixer_set_mute), (gst_alsa_mixer_set_record),
(gst_alsa_mixer_set_option), (gst_alsa_mixer_get_option):
* ext/alsa/gstalsamixer.h:
* ext/alsa/gstalsamixerelement.c:
(gst_alsa_mixer_element_interface_supported),
(gst_alsa_mixer_element_finalize), (gst_alsa_mixer_element_init),
(gst_alsa_mixer_element_set_property),
(gst_alsa_mixer_element_get_property),
(gst_alsa_mixer_element_change_state):
* ext/alsa/gstalsamixertrack.c: (gst_alsa_mixer_track_update):
* gst-libs/gst/interfaces/mixer.c: (gst_mixer_volume_changed),
(gst_mixer_option_changed):
* gst-libs/gst/interfaces/mixer.h:
Revert commits towards #152864 made so far. We'll pick it up again
after the 0.10.13 release.