msm: kgsl: Implement HFI version 2.0

Make the required changes to enable HFI version 2.0
Align packets to 16 bytes, remove message type POST,
reuse CMD messages' IDs in ACKs, and add AB table and
new HFI message. Make changes backwards compatible.

Change-Id: I005806404e1287c928c583e4cae861ae82b0728b
Signed-off-by: Kyle Piefer <kpiefer@codeaurora.org>
Signed-off-by: George Shen <sqiao@codeaurora.org>
Signed-off-by: Oleg Perelet <operelet@codeaurora.org>
Signed-off-by: Carter Cooper <ccooper@codeaurora.org>