audio: Move hosted audio "codec" drivers into their respective target dirs

They are nearly entirely generic wrappers around ALSA controls, unique
per target, and are ripe for further consolidation.

Change-Id: I05e4a450e3e89e03616906601c4f8fa46200dff5

firmware/target/hosted/android/android-codec.c

@@ -0,0 +1,40 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright © 2010 Thomas Martitz
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+
+#include "config.h"
+#include "audiohw.h"
+#include "pcm-android.h"
+
+void audiohw_set_volume(int volume)
+{
+    pcm_set_mixer_volume(volume);
+}
+
+void audiohw_set_balance(int balance)
+{
+    (void)balance;
+}
+
+void audiohw_close(void)
+{
+    pcm_shutdown();
+}