ARM: dts: msm: increase I2C clock frequency to 400khz

Cold output latency value exceeds the bench mark
as sound wire register read and writes are taking time.
Increase the I2C clock frequency to optimize the time
in soundwire reads and writes.

CRs-Fixed: 1106212
Change-Id: I230df406b13e15bdf9c82571d205fee9093f9d5c
Signed-off-by: Surendar karka <sukark@codeaurora.org>