Revert "ASoC: msm: Do not stop session if afe port is closed"

This reverts commit edf78a07.

- Userspace code now handles recovery from underrun scenario
by closing and reopening the pcm session.
- ASM sessions use virtual Proxy port for the same AFE Proxy
port. When one session closes the virtual port other session
should be notified of the port closure. This was earlier
removed to ensure handling underrun scenario. Now that user
space reconfigures the session, all the sessions running on
the same port are notified of port closure.
- Reverting the change stops the session during underrun and
allows userspace to close and reopen the pcm session to
recover from underrun scenario.

Change-Id: I407c4b8bec20a31ecd42402b5b7d0a60b3e70fff
CRs-fixed: 337562
Signed-off-by: Jayasena Sangaraboina <jsanga@codeaurora.org>