audio/msm7x30: fix for SEMC devices with stereo hw speaker

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Conflicts:
	legacy/msm7x30/Android.mk
	legacy/msm7x30/AudioHardware.cpp

Change-Id: Ice6207232bea52a8d2abb2666a7c86e91dc47ffb