MLK-25362 arm64: dts: imx8mp: use max-pixel-frequency to differentiate used MIPI...

MLK-25362 arm64: dts: imx8mp: use max-pixel-frequency to differentiate used MIPI clock

This patch replaced link-frequencies to express single/dual cameras case, which
is introduced from 21c3114f6b280aef16b9298857ba2cd6f3e6d479
MLK-23600-6 Update Basler camera link-frequencies to differentiate used MIPI clock

Originally from Thies Moeller <thies.moeller@baslerweb.com>
With the fix for max-pixel-frequency for dual cameras basler camera + ov5640.

For other sensor porting, could also use max-pixel-frequency property.
Other properties might be optional.

Signed-off-by: Robby Cai <robby.cai@nxp.com>
Reviewed-by: G.n. Zhou <guoniu.zhou@nxp.com>