asoc: Fix port collision interrupt in WSA

During multiple PDR usecases, due to sync issues
port collision interrupt is observed.
set wsa state to device down  before cancelling the ocp
workqueue and bail out from the workqueue when wsa state
is set to device down.

Change-Id: Ibefb338c1d6d2901b8773928fa2c0c48b51ac6f7
Signed-off-by: Prasad Kumpatla <nkumpat@codeaurora.org>