msm: mdss: hide kernel addresses from unprevileged users

for printing kernel pointers which should be hidden from unprivileged
users, use %pK which evaluates whether kptr_restrict is set.

CRs-Fixed: 987021
Change-Id: Ie49eee9478f4657cfb2a994ba60da1ec4c356339
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>