msm: kgsl: Use our own fault handler for the secure context

Register our own fault handler for the secure context so we
handle it ourselves and not use the complex, funky SMMU fault
handler.

Change-Id: Ide16a56dc6f2555310efe2820f9afc779da439cb
Signed-off-by: Shrenuj Bansal <shrenujb@codeaurora.org>