Integrate meta-seco-imx/u-boot-seco-imx/seco_lf_v2021.04_962ram_ym

Commit: edgehog/layers/seco/meta-seco-imx@45479bd2

Integrate u-boot-seco-imx/seco_lf_v2021.04_962ram_ym

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Commit: edgehog/bsp/nxp/u-boot-seco-imx@cce70593

[962] fix qd 4x512M ram configuration not booting

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Commit: edgehog/bsp/nxp/u-boot-seco-imx@312c82ef

[962] fix solo 2x256M ram configuration (incorrectly detected as 1G)