msm: camera: isp: Fix some stability issues

This change updates the order of error notification, in case
the UMD already receive the error notification and power down
the isp, then the following register dump may meet problem.
This change also add lock protection for csid cmd processing,
in case the csid has released before processing the cmd.

CRs-Fixed: 2783264
Change-Id: I7399d819d1cdadb96b6824cdb4b53aa0167e527b
Signed-off-by: Depeng Shao <depengs@codeaurora.org>