This patch changes some features of the a3m071/a4m2k board support:

- Add bootcounter support
- Update MTD env default to correct values
- Add mtdparts to bootargs for mtd partitioning via kernel cmdline
- Added some default env variables for easy updating (kernel, dtb)
- Change README to the updated flash locations

Signed-off-by: Stefan Roese <sr@denx.de>

Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>

There will need the environment in SPL for reasons other than network
support (in particular, hwconfig contains info for how to set up DDR).

Add a new symbol CONFIG_SPL_ENV_SUPPORT to replace CONFIG_SPL_NET_SUPPORT
for environment in common/Makefile.

Signed-off-by: Ying Zhang <b40530@freescale.com>
Reviewed-by: Tom Rini <trini@ti.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

The changes to a3m071/a4m2k in summary are:
- Enable CAN1 on I2C in GPS Port Configuration
- Enable SPI on PSC2
- Activate network console
- New flash partitioning
- Fix some typos
- Pass host name to Linux
- Change rootfs to squashfs,jffs2
- Enable UBI/UBIFS support
- Enable FIT support

Signed-off-by: Stefan Roese <sr@denx.de>

The v2013.04 release has this patch set included:

5cb48582 "Add architecture-specific global data"

With this, the global_data struct is now common and new variables
have been added. Resulting in a bigger struct. Unfortunately the
currently allocated 128 bytes are just a bit too small for this
new struct.

This patch now uses the automatically generated struct size instead to
not run into this problem again.

Please note that this problem might hit some other platforms which
currently reserve a tight space of 128 bytes for the global_data
struct!

Signed-off-by: Stefan Roese <sr@denx.de>

Signed-off-by: Stefan Roese <sr@denx.de>

This patch adds a custom U-Boot command "wdogtoggle" which enables the
external hardware watchdog toggling via an GPIO pin on the a4m2k
board. After issuing this commands, the watchdog will be serviced
by U-Boot so that the user can use all U-Boot commands from the
prompt.

Signed-off-by: Stefan Roese <sr@denx.de>

This patch adds the a4m2k MPC5200B board port. Its a derivate of
the a3m071 board with only minor changes.

Additionally this patch includes some clean-up changes:
- Remove I2C support from a3m071 as its unused
- Fix/enhance default env variables
- Fix some comments
- Add newly introduced CONFIG_SPL_TARGET to automatically build
  "u-boot-img.bin"
- Fix dtb patching in READ desciption for SPL Linux booting:
  "fdt chosen" needs to get called to patch/create the chosen node.
- Add missing call to spl_board_init():
  Define CONFIG_SPL_BOARD_INIT so that spl_board_init() will get
  called in the SPL version.

Signed-off-by: Stefan Roese <sr@denx.de>

This patch adds support for the a3m071 board based on the
MPC5200.

Signed-off-by: Stefan Roese <sr@denx.de>