ASoC: Don't set command state value for session time

Get session time command don't use the command state
value used for control commands. Don't set that state
value as it leads to volume command being timed out
which is waiting for this value to be reset.

Change-Id: I734a1ed7f4fda8d1367c27b71d7bfe5070f2ffc6
CRs-fixed: 377431
Signed-off-by: Swaminathan Sathappan <Swami@codeaurora.org>