msm: kgsl: DRM now using new memory interfaces

Modified to use memory management API provided by KGSL.  Cleaned up
unused function overrides, and fixed memory leak.

Change-Id: I28c2d5c56b559e0ee5c46d25a2a22d694d3b6b9d
Signed-off-by: Michael Street <mstreet@codeaurora.org>
2 files changed