Revert "audio/msm7x30: Updates for MR2"

This reverts commit 5f35ee4290b8420efc56e1af60d4932c8008a76d.
msm7x30: use policy manager from ALSA

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

Change-Id: I81b65df83425fbb3fada33d53eda4f449f55ea55