msm: mdss: add support to configure per pipe qos lut

This change adds support to set the qos lut
for each real time and non real time rotator
read clients.
Qos lut is configurable through dtsi, so it
can be adjusted per chipset.

Change-Id: I423265032c4a618039cdcfdad0a1f963f45ae5c6
Signed-off-by: Ingrid Gallardo <ingridg@codeaurora.org>