clk: msm: clock-gpu-cobalt: Update the GPU PLL FMAXes

The clock driver only needs to put a MIN_SVS vote on the MX rail
on behalf of the graphics PLLs. Update the fmax tables for the
PLLs appropriately.

CRs-Fixed: 1040775
Change-Id: Icb84b40128c54edefdec13f61fe9252811c1a14a
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>