msm: kgsl: use %pK to restrict printing GPU / memory addresses

Use %pK in the output for the per-process memory dump to keep from
printing the GPU and user memory addresses for the GPU memory
objects own by the process.  This allows us to make the 'mem' file
world readable without exposing any really dangerous information.

Change-Id: Ic0dedbad21654110905d1b3744f562966584d8ed
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>