The following is an update to Koen Kooi's original series that updates support for the next beaglebone platform and switches to DT booting as the default.
I want to spell out that part of the changes I've done here are adding two variables to make it easier to control where we load our kernel/dtb from. For example, some distributions may place these on an ext* partition while others may lump them into the FAT partition up front for "easy" updating. The first variable (bootpart) lets us control that as well as which MMC device (SD card or eMMC) they are grabbed from at all. The second variable, bootdir lets us control where we load the files from, within the device. This is needed because findfdt will tell us 'am335x-bone.dtb' but that might be /boot or it might be top level. We assume /boot but can easily override this with uEnv.txt
Changes since v1: - Add CONFIG_CMD_FS_GENERIC, use in parts 2 and 3 - As part of this, kill loaduimagefat since loaduimage uses the generic load command. - Add loadfdt command rather than a direct call to load the fdt.