msm: kgsl: Simplify GBIF halt sequence for stall-on-fault case

Currently during stall-on-fault recovery, we keep resuming SMMU and
check if GBIF halt succeeded. This is done to recover from a case where
a GPU block continuously initiated faulty transactions, which would keep
stalling SMMU. If we set CFCFG to 0 as part of handling the first fault,
all these transactions will be terminated and will not stall SMMU. This
simplifies the GBIF halt sequence and avoids resuming every time.

Change-Id: Iada83d6a08e5e0a4f6241b17d1b178ab680f1364
Signed-off-by: Puranam V G Tejaswi <pvgtejas@codeaurora.org>