msm: camera: isp: Reduce logging as part of camif dump

Currently when an error irq is encountered; the entire vfe
register space is dumped which can cause a WD bite.
This change dumps only necessary registers which would help
infer the cause for the error.

Change-Id: If67a71877ea85175d09b9226db1b8e38c7c3b3f0
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>