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

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/db049d2e12c9a3a1ad8484b2fb38b225d58cb03a

[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

--

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/617272682445996571d46c643adb1e12e2670166

[C72n][DTS] add mcu_rdc definition from evk

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

--

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/3868ef033947e29d7a08e0418dbaf93117a635f7

[C72n][DEFCONFIG] add SECO_ECOSYSTEM flags

--

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/aa4c9a429b3b729d213e2c44b167cc5606aebaeb

[C72n][DEFCONFIG] add defconfig

--

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/435f543dbea6f9f88d0cb7de2feac6869127d302

[C72n] add overlays file name definition

--

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/d9444df3582f6f76ba91562eaf0b6f023f96d8e0

[C72n] enable usdhc_devno definition in proto_seco.h

--

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/8d2b9f90453a93edbca4d29c32af2cd4d4648b42

[C72n] add strap_cfg for board type detection

--

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/7fd470ddb5c467decf2e0a185d57117eb4455195

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

--

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/32630ad6a909c81d210ce87f00e19ce02cc58356

[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

--

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/a9ebaee3d57abb9fd2f19713dcee0da852613c4d

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

--

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/678cb2f43b33cfc49291bca5f6fd18a13ca618f9

[C72n] create board folder with env_conf.h

--

Commit: https://git.seco.com/edgehog/bsp/nxp/u-boot-seco-imx/-/commit/d30160156702ba90a2c4a27b816e04aa398a40a1

[C72n] add board configuration inside include/configs