msm: camera: isp: Improve logs

This change improves the readability of a few logs. It updates
camif register dump routines to reflect version 480 hardware.
It also alters the dump to be enabled during runtime using
debugfs.

Change-Id: Ic4ef613d08469156168b9048c3f611447826066a
Signed-off-by: Venkat Chinta <vchinta@codeaurora.org>