msm: kgsl: Option to not stall IOMMU V1 on pagefault based on FT policy

There are cases where GPU has a pagefault and executes
fine after pagefault without GPU stall. init.qcom.graphics.sh
script can be used to change FT pagefault policy
to not stall IOMMU V1 on pagefault and check if pagefault is harmless.

Change-Id: If061230b66181bfd94c697ea106e7bf4de352e91
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>