msm: kgsl: Reset HLSQ in A4XX snapshot

When dumping A4XX snapshot reset the HLSQ and CP before dumping
the SP, TP registers and shader memory. This is required to eliminate
the possibility of hitting a deadlock when the AHB bus is split or
if the HLSQ pipe is busy.

Change-Id: I1dac4bc4db0b267e2aa8f7990992e897e4d340d9
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>