msm: kgsl: Increase the SVM and non-SVM address space

Increase the SVM and non-SVM address space for 64 bit processes.
The SVM address space is increased from 4 GB to 252 GB. The non-SVM
address space is increased from 4 GB to 256 GB.

Change-Id: I7774cfdf59a2b00dc348d601b834d85059f12a86
Signed-off-by: Raghu Ananya Arabolu <rarabolu@codeaurora.org>