msm: kgsl: Add Qualcomm GPU driver

Snapshot of the Qualcomm Adreno GPU driver (KGSL) as of msm-4.4
commit 97e6e94b40eb ("Promotion of kernel.lnx.4.4-161210.1.").

Change-Id: If5a8141cf7224d9661aba70576356a1ed2a99996
Signed-off-by: Shrenuj Bansal <shrenujb@codeaurora.org>
Signed-off-by: Lynus Vaz <lvaz@codeaurora.org>