tegra-alt: adsp: request ACK when closing PCM stream

tegra-alt: adsp: request ACK when closing PCM stream

Request ACK and wait when closing PCM stream.

Bug 200100724

Change-Id: I1a12a3a8efff0e25152c148e4b74b163f0b4f63d
Signed-off-by: Viraj Karandikar <vkarandikar@nvidia.com>
Reviewed-on: http://git-master/r/834456
(cherry picked from commit 21b996e65952154add4238e87c690a7e086c89c5)
Reviewed-on: http://git-master/r/840362
Reviewed-by: Ravindra Lokhande <rlokhande@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Sumit Bhattacharya <sumitb@nvidia.com>