ARM: dts: msm: Fix clock entries for SDE on SDM855

This change fixes the clock rate and max rate entries for
SDE clocks so that core clock and vsync clk rates match
with the required rates.

Change-Id: Ie16f273d127b9667b4fb7afcb4a582d9c18eef44
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>