msm: kgsl: Fix the offset of FSYNR1

Define the offset of FSYNR1 IOMMU register correctly for IOMMU-v0.

Change-Id: Ibcbc863e1be02da3be22dd1a9cfe4a41e043d503
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>