On the RT1170-EVKB, the framebuffer displays incorrectly
(shifted by about 1/4 of the screen width). This is because
pixelclk-active was set to 1 (which corresponds to
kELCDIF_DriveDataOnRisingClkEdge).
According to the RM68200 datasheet, the DSI transfert begins at
the uprising pixel clock and stop at the falling pixel clock. So,
pixelclk-active needs to be set to 0 (which corresponds to
kELCDIF_DriveDataOnFallingClkEdge).
Signed-off-by: Trung Hieu Le <trunghieu.le@nxp.com>