Integrate u-boot-seco-imx/seco_lf_v2021.04_develop_ym_962

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/6c37c84f49b05e81dac7868fa55ccdf1cc1cb7e9

[962] fix eMMC reset and pad control at SPL

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/06214be1e0725bbb50457d0058781c41eba92b59

[A75] fix platform name detection at SPL

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/844267bfea96259a7079df5515ea8e2f0654474a

[A75] fix eMMC reset and pad control at SPL

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/f57518ef021ac11e147dc132c9f9486b91ee5ee4

[A75] fix boot device detection

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/4f573ad6ecdb97d3e90bbd163153097d025469e4

[A75] Remove HDMI-LVDS and LVDS-HDMI framebuffer conflict

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/ea541d4677520410f473b962ed6410ef39402e77

[A75] fix HDMI kernel command line spec_list

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/cc7d5386a3c2db28899dec5fc6f389ddb07bd45a

[A75] add overlays constants names to seco environment

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/39eb21cf988a76bfc452d80cbb9edbb62def6462

[A75] update seco_config constants names

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/757ca4c941aeb786d0b005a08ef38eacad6750fe

[A75] update ram calibration values for 2x512M configuration