msm: clock-8960: Disable SMMU SFPB hardware clock gating

Disable hardware clock gating for the SMMU ahb interface as
testing has shown that having it enabled leads to random lock ups
in the multimedia subsystem.

Change-Id: I9bced1aa8988e5ec2986959fa4e95cd3ccd46ef0
Signed-off-by: David Garibaldi <dgaribal@codeaurora.org>