Revert "msm: kgsl: Limit GPU memory buffer allocation sizes"

This reverts commit 98b1a5e3e2603e8ecb276919a10d645016fb35a4.

It caused a lot of IOCTL_KGSL_GPMEM_ALLOC failed: errno 12 Out of memory
Easily reproducible e.g. on lockscreen rotation - could be seen
as sudden black background or white screen after wake-up or during rotation.

Conflicts:

	drivers/gpu/msm/kgsl_sharedmem.c