Change NAND offsets for 8MB kernel partition
OMAP3: overo: Work around HW ECC error.

This is a workaround to disable subpage reads when the
ECC mode is not NAND_ECC_SOFT as discussed:
http://u-boot.10912.n7.nabble.com/NAND-write-error-with-HW-ECC-on-OMAP3-td162420.html
Revert "Change NAND offsets for 8MB kernel partition"

This reverts commit caeb2230d84a420dc70c2c30b4611f85c605d07f.
OMAP3: overo: eliminate hard-coded partition offsets

The linux kernel is at nand0,3 using the current layout, but is best
accessed through the partition label "linux".  Since CONFIG_CMD_MTDPARTS is
defined the CONFIG_JFFS2 settings are unreferenced; use "setenv partition
rootfs" to set the default mtd partition for jffs2.

Signed-off-by: Peter A. Bigot <pab@pabigot.com>
omap4: duovero: Add DuoVero machine.

This adds the Gumstix DuoVero machine.  This is a OMAP4430-based
computer-on-module (COM aka SOM) that can be mounted on various
expansion boards with different peripherals.