openrisc: fix build due to redefined phys_size_t ...

We already have a phys_size_t since:

commit 2f05b69
Author: Renaud Barbier <renaud.barbier@ge.com>
Date:   Fri May 11 11:58:13 2012 +0100

    linux/types.h: define phys_size_t

    Add this definition in preparation for the introduction of the
    mpc85xx support.

    Signed-off-by: Renaud Barbier <renaud.barbier@ge.com>
    Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Fix build due to redefinition of this type.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ENV: remove kernelimage_type from env/config ...

drop kernelimage_type bootm now boots all of them.

Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands: remove struct command pointer from commands ...

This is unused in all commands and thus can be removed.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add a generic board ...

In this generic configuration, the board can be run in the
or1ksim simulator with the linux configuration file using
the UART to print the console.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Add OpenRISC arch ...

OpenRISC is the original flagship project of the OpenCores community.
This project aims to develop a series of general purpose open source
RISC CPU architectures.

A team from OpenCores provided the first implementation, the OpenRISC
1200, written in the Verilog hardware description language.

Even though I should have created an mach-or1200 directory, it is not
necessary for now. The OpenRISC 1200 CPU is the only one available and
it will be for some time.

Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>