nbhw16: added nbsw style u-boot environment settings
nbhw16: added factory reset and recovery boot support via reset button
nbhw16: set hardware version on kernel command line
nbhw16: removed dummy u-boot partition
Because i2c must be available extremly early (before RAM setup) to get
the board configuration, I decided to create a new board instead of
adding everything to the am335 stuff rom ti. This is not uncommon (see
baltos)
Now the a reset will start the SPL correctly again.