[TF-A] Adding support for phyCORE AM62L in TF-A

Hello!

We’d like to add support in TF-A for the PHYTEC phyCORE AM62L. On this board we need BL1 to read the on-board EEPROM via I2C to set the correct DRAM timings. Right now we have it working by editing the TI AM62L files on TI's TF-A fork and adding the EEPROM and I2C drivers.

Our questions are: - Should we create a separate board for phyCORE AM62L, or would it make more sense to include this as an option in the TI AM62L support? - How much abstraction should we implement for EEPROM and I2C drivers?

Thanks for any advice!

Best regards, Florijan Plohl