msm: kgsl: Setup LPAC global pagetable

When we unhalt the GC SQE, the microcode also unhalts the
LPAC SQE. Therefore, we need to map the globals to LPAC context
bank as well.

Change-Id: I6749357036dd7bc90d6958a3f805943c8cae92c7
Signed-off-by: Harshdeep Dhatt <hdhatt@codeaurora.org>