ARM: dts: msm: Fixes warnings in kona device tree

Ensures that the device trees for kona follow the requirements of the
device tree compiler as well as guidelines set for writing device tree
code.

Change-Id: I6e01f7c0c8517a4bdfd18d0ffd0f801bdcf86ecc
Signed-off-by: Maria Neptune <mneptune@codeaurora.org>
Signed-off-by: Channagoud Kadabi <ckadabi@codeaurora.org>