msm: kgsl: Update sizes for preib and postib command sizes

The command sizes for the pm4 packets have changed for A5xx and
need to be accounted for while doing math for the adreno
profiling.

Change-Id: Ib5449a8b3358a6a7c165eceec7af264f9d7fe29f
Signed-off-by: Shrenuj Bansal <shrenujb@codeaurora.org>