msm: kgsl: Add support for gaming bin detection

User mode driver is using speed bin value to determine
whether part is gaming SKU or not but on some parts
speed bin value is same for both gaming and non-gaming
SKU and differentiation happens based on whether gaming
bin fuse bit is set or not. Add support to read gaming
bin fuse bit and return its value to user mode driver.
This will allow user mode driver to detect whether part
gaming SKU or not.

Change-Id: Ia34762167e47595045a15d073ae0f09917903069
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>