msm: kgsl: Disable CP speed up during bootup for A430 derivatives

The CP speed up had to be disabled for the bootstrap sequence for
A430 due to failure during ME init. The same problem exists on
the GPUs derived from A430 and the same fix needs to be applied
to these as well.

CRs-Fixed: 808510
Change-Id: I094f869abbdc64c4b85837bce2f8c8ed1986ae6c
Signed-off-by: Rajeev Kulkarni <krajeev@codeaurora.org>