morello: change display pixel clock pad slew rate
Created by: patrik-arm
Due to a corruption issue in the display output on the SoC, the slew rate of the pixel clock output pad need to be changed from the default FAST to SLOW.
Signed-off-by: Patrik Berglund patrik.berglund@arm.com Change-Id: Id177a0151231395e89e8c3b357208730779a6af7