Integrate linux-imx-kuk/update_pixelclk_mc3

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Commit: seco-ne/kernel/linux-imx-kuk@00c08635

dts:mc3: Updated the pixel clock of the LCDIF2

We now have a LVDS receiver that can handle slower pixel clocks.
Reduced the pixel clock further, to stay inside the display specs.

BCS 746-001313