ASoC: msm: qdsp6v2: Handle SSR for audio playback over BT usecase

Proxy afe and pcm afe instances are not reset to 0 when
adsp ssr happens during audio playback over BT. Reset these
instances to 0 to avoid playback failures after subsystem restart.

Change-Id: I9288a01fb92504eb829172403447fecefff81136
Signed-off-by: Phani Kumar Uppalapati <phaniu@codeaurora.org>