display: msm: sde: update qos lut after scaler config

This change moves the code of updating the qos lut for qseed3
to each plane after updating the scaler configuration. This
avoids using stale values for qos settings.

Change-Id: I2c55a98e1ba9790d596c55160933cd5afd2388e5
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>