msm: kgsl: Change b/w vote for new power level

Change the bus scale table of the new power level
to use low vector instead of init vector. This
change is only needed on mainline as the new power
level is defined only for mainline.

Change-Id: I2857d9deb6eac1168ad73f3922c790a9a46eeba1
Signed-off-by: Suman Tatiraju <sumant@codeaurora.org>