Integrate meta-seco-imx/u-boot-seco-imx/develop_c72_generic

Commit: edgehog/layers/seco/meta-seco-imx@4e933dc2

Integrate u-boot-seco-imx/develop_c72_generic

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Commit: edgehog/bsp/nxp/u-boot-seco-imx@ec06055e

[C72] Enable compilation of Mini and Nano using the same board directory

We use the target to discriminate SoC specific files to compile

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Commit: edgehog/bsp/nxp/u-boot-seco-imx@2d097368

[C72 Mini/Nano][STRAP_CFG] Add strap configuration for dual-chip RAM (x32)

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Commit: edgehog/bsp/nxp/u-boot-seco-imx@b1c619b6

[C72 Nano] Use specific RAM configuration when necessary

We need to discriminate between single chip (x16) and double chip (x32) RAM configurations when calibrating. Print an error message when calibration is not present.

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Commit: edgehog/bsp/nxp/u-boot-seco-imx@2ab8c3e9

[C72] Move C72 Nano files to generic C72 directory

We want to unify as much code as possible between C72 Nano and C72 Mini: strap_cfg.h, strap_cfg.c, env_conf.h will be in common