msm: ice: check for crypto engine state before processing request

Crypto engine can be put to suspend by host controller after workqueue
is scheduled. Also shutdown sequence can be ongoing while workqueue is
scheduled/executing. The request passed to crypto driver in these
cases can be invalidated by host device driver. So check for crypto
engine state before processing the pending requests.

Change-Id: I4aa2a211e439a876c8525ab062a7cb917b4e2d7e
Signed-off-by: Prerna Kalla <prernak@codeaurora.org>