ARM: dts: msm: GPU bus DCVS IB voting changes for msm8939

Change GPU bus DCVS IB voting values w.r.t. modified BIMC clock plan.
BIMC old values: 166.8MHz, 333.6MHz, 400MHz
BIMC new values: 165.6MHz, 331.2MHz, 398.4MHz

Change-Id: Iae79583cb787b8a723df6346c9681f5e6fb9d4eb
Signed-off-by: Ananta Kishore K <akollipa@codeaurora.org>