msm: camera: isp: Correct command type while dumping buffer

Command type is getting fetched from the source start address.
Fetch the command type from the current address which is
updated as the buffer is parsed and dumped.

Change-Id: Ibd08613777fda1d6b30f461306370ebd1a755583
Signed-off-by: Gaurav Jindal <gjindal@codeaurora.org>