Integrate meta-seco-imx/u-boot-seco-imx/seco_lf_v2021.04_develop_c72n_ym

Commit: https://git.seco.com/edgehog/layers/seco/meta-seco-imx/-/commit/41796fbab5b5a55f26fe27401b2612dfe54f8cd0

Integrate u-boot-seco-imx/seco_lf_v2021.04_develop_c72n_ym

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/07bc69be1390ed7d069dd86c91a0ad2ee630f560

[C72n] add automatic DSI bridge detection via i2c

there are 2 possible option for the DSI bridge:

• SN65DSI84 DSI to LVDS
• SN65DSI86 DSI to eDP they are both mounted on the i2c bus 1, but at different address, so we can detect which is present by probing; we use this information to provide only suported video modes options

NOTE: LVDS bridge is not yet supported by the kernel

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/07395de3f2a62c74fd5740fc7ec633e6411cb32f

[C72n][DTS] add mcu_rdc definition from evk

fix SPL warning: "Failed to find node!, err: -1!"

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/d6f5bc7eb6478101e882490cf3f84869e66b6efa

[C72n][DEFCONFIG] add SECO_ECOSYSTEM flags

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/9f2a6d32f5ee877958e8a42800b73da9a9d0d46f

[C72n][DEFCONFIG] add defconfig

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/291685153476b6079572c2b897e6835fcbf4cc0a

[C72n] add overlays file name definition

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/268baa37718a01f43f48e69edfef89c7a2bc150c

[C72n] enable usdhc_devno definition in proto_seco.h

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/2321b3b3b2745478a88316ce293f7edc0b3cc0a3

[C72n] add strap_cfg for board type detection

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/3dbb48ebad77c64ba6d0b36cd7fe230e7c9c27c1

[I.MX8M][C72n] add C72 Nano DDR4 board to imx8m Kconfig

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/769a989b953e47fc7642425ac1636ea6c943c3ba

[C72n] add platform support

new file:   board/seco/imx8mn_c72/Kconfig
new file:   board/seco/imx8mn_c72/Makefile
new file:   board/seco/imx8mn_c72/ddr4_timing.c
new file:   board/seco/imx8mn_c72/imx8mn_c72.c
new file:   board/seco/imx8mn_c72/spl.c

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/ef47dc4472bada5650873ccad01f6c3ecb2e3a60

[C72n][DTS] add devicetree for u-boot

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/4f47f5a2c5c2ac758cb4fda94b91a4d88da6cc6f

[C72n] create board folder with env_conf.h

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Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/92e873110e84be841585c199cb8211efa3d5d955

[C72n] add board configuration inside include/configs