display: Fix support for MDP 4.1

 * MDP 4.1 still does not support the borderfill pipe, baselayer logic
   should not be used.

Change-Id: I587bdff4a03ced141e43819eea70cec1aedaeb7b
Merge pull request #17 from CyanogenMod/cm-10.1

display: Fix support for MDP 4.1