drm/msm/dsi-staging: add support to parse ESD specific dt params

ESD check feature can be implemented in multiple methods and each
method has its own set of parameters. This change adds support to
parse various configuration related parameters for ESD feature.

Change-Id: I9b29f174f38b56173e0236d33457af209a0e764a
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>