msm: kgsl: Specify the initial pwrlevel for each speed bin

Some platforms support multiple GPU clock plans based on the speed
bin in the efuse. Specify the wake up frequency of each speed bin
individually to wake the gpu at the correct powerlevel.

CRs-Fixed: 967494
Change-Id: I9890b8a710d7055c30f9ae7612b092af8fa8a9f5
Signed-off-by: Suman Tatiraju <sumant@codeaurora.org>