msm: kgsl: Add support for split pagetables

Attempt to enable split pagetables on the global and LPAC domains.
If successful we no longer need to map globals in all pagetables and we
don't need to manually return to the default pagetable when coming out
of slumber since all the globals will now live in the always on TTBR1
region.

Change-Id: Ic0dedbaddd7d05299d7e85d7b0bbc96b46dad10e
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>