msm: mdss: allow ESD check to be enabled at runtime

In current panel ESD feature, there is no way to enable
ESD check at runtime if it is not set in DT property.
This code change allows to enable ESD check feature from
sysfs node dynamically irrespective of DT property set.

Change-Id: Ie44eca60c02dec108eaac562e49cda34b8093b06
Signed-off-by: Sandeep Panda <spanda@codeaurora.org>