msm: mdss: update MDSS DSI ULPS configuration

Update the DSI ULPS configuration to make sure command mode
panels with ULPS enabled boots up correctly.

Change-Id: Iecfe5725fb69a9e00299bcffe1f685c9e14de49d
Signed-off-by: Althaf Neelanchirayil <aneelanc@codeaurora.org>
Signed-off-by: Nirmal Abraham <nabrah@codeaurora.org>