msm: kgsl: Fix incomplete IB2 dump in the snapshot

If there is IB2 address overlap with IB object list,
driver is dumping pending dwords size of active IB2
data into snapshot. Fix this by updating IB2 size
while active IB1 parsing instead later point.

Change-Id: Ibb12a876ebf73846424232ef28e00d3dc9f9be59
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>