powerpc/ppc4xx: Add support for iocon fiber

Add a new iocon flavor with fiber instead of copper connectivity.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Stefan Roese <sr@denx.de>
powerpc/ppc4xx: Add support for iocon-2

Add a new iocon flavor with a second communiction port per channel.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Stefan Roese <sr@denx.de>
powerpc/ppc4xx: Do full iocon PHY initialization in software

Up to this point some PHY initialization was done from the FPGA
and some from u-boot.
From now all initialization is done from u-boot.
To keep this maintainable a PHY setup machine was implemented that can
execute commands from initialization arrays.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Stefan Roese <sr@denx.de>
powerpc/ppc4xx: Fix dlvision-10g reset gpio

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
Signed-off-by: Stefan Roese <sr@denx.de>
serial: arm_dcc: Convert to use default_serial_puts

Use default_serial_puts() instead of its own implementation.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Marek Vasut <marex@denx.de>
Acked-by: Michal Simek <monstr@monstr.eu>