Integrate meta-seco-imx/linux-seco-imx/d18-lcd-pwms

Commit: https://git.seco.com/edgehog/layers/seco/meta-seco-imx/-/commit/403736dd2a7391d2716d09907ded7a0a80bff983

Integrate linux-seco-imx/d18-lcd-pwms

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Commit: https://git.seco.com/edgehog/bsp/nxp/linux-seco-imx/-/commit/b73e87a08c5630f8d1fa5d4c9b38ed2cdaaa3773

[D18] fix lcd backlights pwm-cells error

To support polarity inversion i.MX8MP DT has been changed use 3 pwm-cells. Align lcd backlights pwm by selecting normal polarity.