msm: kgsl: Allow pagefault policy control using debugfs

GPU pagefault policy can be set to below options:
   a) enable/disable GPU HALT on pagefaults
   b) log only one pagefault per page.
GPU pagefault policy can be controled using debugfs.

Change-Id: I5ce1f277167c3d15309e829c23d37cc68b2311da
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>
6 files changed