msm: audio: qdsp6v2: Fix noise issue while SSR

- When SSR is done, we hear an extra noise sound.
- During SSR, Q6 is stopped and AUDIOIF will send the
left over samples in DMA buffers continuously to codec
resulting in noise.
- Disable the active SND devices when SSR is initiated.
This will avoid any noise happening while SSR in progress.

Change-Id: I1a14494a52607a8245231395bab6b14ad4a02d53
CRs-Fixed: 333915
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>