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: I92b926e4963af86780e92e21a592106ef38a4624
Signed-off-by: Prerna Kalla <prernak@codeaurora.org>