ARM: dts: msm: Increase encode bus vote for msm8937 and msmgold

Increase the bus vote for encode usecase as per new recommendation
from system team.

CRs-Fixed: 968391
Change-Id: Ibee806263c496f21551cafcb11d0e0276fb06e56
Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>