ARM: dts: msm: Update GPU bandwidth voting for SDM632

Update the bandwidth voting for GPU min. and low SVS
frequency corners. This is needed to improve performance
of few use cases.

Change-Id: I1aaabd8fe4d00bff9d40056bde9bb0bbdb05d9ee
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>