Merge patch series "board: siemens: clean up subfolders"

Enrico Leto <enrico.leto@siemens.com> says:

    The common folder was initialially created for the common parts of
    the products based on draco-am355x board family. We have the
    product lines 'pxm2', 'rut' and the base line unfortunately named
    'draco'! Adding the new capricorn-imx8 board family, the files
    were enhanced without cleanup.

    Simplify first EEPROM probe and access that implements both i2c
    with & without driver model. Use abstraction functions for this.

    Move all am355x specifics to a new file 'board_am335x'.

    Clean-up includes, config checks, maintainer.