ARM: dts: msm: update venus clock frequency table for 8929

In 8929, max venus clock frequency restricted to 200Mhz for wfd
concurrency scenarios. Also updated max load supported by 8929 as
720p 30fps encoding and 1080p 30fps decoding.

Change-Id: I2b3484a6b611547018425224b974b870eccfa19f
Signed-off-by: Srinu Gorle <sgorle@codeaurora.org>