Integrate uboot-imx-kuk/refactor-spread-spectrum

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Commit: seco-ne/3rd-party/kuk/uboot-imx-kuk@73bc52f3

seco-mx8m[m|p]: Move VIDEO_PLL1 ssc to own function, enable from spl.

We had this in a general pll enable function. Now with a seperate
function it is possible to enable/disable depending on module type
and PCN revision.
Disable for Trizeps8mini V2R2 and later, as the used mipi2lvds
converter uses an external clock, that has to jitter if needed instead.