Integrate u-boot-seco-imx/seco_lf_v2021.04-eeprom-mac-addr-2

Commit: clea-os/bsp/nxp/u-boot-seco-imx@c7f3de63

[LIB][EEPROM] eeprom_init: directly return if already initialized

If multiple parts of the code access the eeprom using seco_eeprom_manager, both are supposed to call the init function, as they should not rely on some other code doing so. Anyway only the first call to the init function should really do the initializtion.

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Commit: clea-os/bsp/nxp/u-boot-seco-imx@a1db81de

[LIB][EEPROM] Add support for MAC_ADDRESS_2