msm: kgsl: Add A304 GPU support for msmferrum

- Add new GPU ID, Macros and VBIF settings for new GPU
revision A304.
- Make existing VBIF 2.x performance counter related
functions and structures generic based on VBIF version
for all A3XX GPUs.

Change-Id: I8054c71149db97a61ec2cb6667f497b6e83f09cb
Signed-off-by: Prabhat Awasthi <pawasthi@codeaurora.org>