Assign button functions based on Android wired headset specs(v1.1).
Signed-off-by: Yong Zhi <yong.zhi@intel.com>
Signed-off-by: Naveen Manohar <naveen.m@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>