RFC: removing eeprom_slave as driver in Zephyr

Peter A. Bigot

The eeprom_slave driver accessed under CONFIG_I2C_EEPROM_SLAVE implements the I2C follower (slave) driver API. This device isn't an actual hardware driver: it's a virtual EEPROM that stores data in an instance-specific RAM buffer, with the data exposed on an I2C bus as a I2C follower device that can be controlled by another device acting as a leader (master) on that same bus.

As such it's a reasonable example of how to write an I2C follower driver, but it's not clear that it has a real use in applications: the sole in-tree reference is in the i2c_slave_api test.

Unless this driver has real-world applications I intend to move this from the drivers directory into the source directory for the test that uses it.  Consequently CONFIG_I2C_EEPROM_SLAVE and the device it provided will no longer be supported.

If you have a use for this driver or other concerns about this please comment at: