On anorak, axi clock is not always scaling till turbo-L1 as both
axi turbo and turbo-L1 are mapped to DDR turbo-L1. Update max ddr
vote for GPU to request slightly higher than turbo-L1 to scale axi
to turbo-L1.
Change-Id: I4a82dca046b3119d2043ab9c3b641eba3ca7f0d5