ARM: dts: msm: Correct GPU IB votes on SDM670

Currently, in 700MHz GPU Fmax clock plan DDR IB vote
for GPU SVS_L1 corner is mapped TURBO DDR frequency.
This is incorrect and causing power regression.
Correct IB votes for 700MHz GPU Fmax clock plan to
avoid power regressions.

Change-Id: I01987ef1c18d0dc29061e0fc4e1fd63a1164009a
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>