msm: kgsl: Fix "Resize CP ROQ for A320/A305"

Change e8d3586f
reduced the size of the ST queue in the CP ROQ to
8 bytes. Although that queue is almost never used,
it appears that setting it this low can sometimes
cause an unexpected hang when it is used. This fix
increases the size of the ST queue to 16 bytes,
which gets rid of the hang.

We should still be able to get the majority of
the performance benefits with this new size.

Change-Id: Id3dc79d7cd62f6f1669e62825e49aa0502b90bca
Signed-off-by: Kevin Matlage <kmatlage@codeaurora.org>