msm: camera: icp: Check HW state prior to IRQ processing

Check ICP HW state before processing any IRQ to avoid
any unclocked access.

CRs-Fixed: 2816854
Change-Id: I31fc03f655b1068f5d171385891eba7d281bd4fd
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>