msm: camera: ope: Add context state check in process cmd

There is chance that release hw run before process cmd workq
which got scheduled as part of config hw. This causes workq
to continue the context though it got released as part of
release hw.

Added a context state check in process cmd workq handler to
avoid submitting request to cdm hardware.

CRs-Fixed: 2670524
Change-Id: I7009d4b60bd97b9f6d46df51790c127a2cf18205
Signed-off-by: Alok Chauhan <alokc@codeaurora.org>