ARM: dts: msm: fix snow screen during resume

Valid frame should be pushed before sending the panel on command.
Split the panel init sequence and use qcom,mdss-dsi-post-panel-on-command
to send panel on command.

Change-Id: Iae579e2de41cdb5a4ba0163f33c3d9f9aef05c4d
Signed-off-by: Sachin Bhayare <sachin.bhayare@codeaurora.org>