msm: kgsl: Correct the register base address used for HLSQ/SP/TP snapshot

Fix the base addresses used to calculate register offsets relative
to the aperture in the snapshot for HLSQ/SP/TP through the HLSQ
debug bus.

Change-Id: Ia73e6ef9d28930d99033fef5a41f91588837ecd6
Signed-off-by: Shrenuj Bansal <shrenujb@codeaurora.org>