After a gap of over three months, there seems to be some activity with the APC kernel and uboot source on GitHub..
Changes were made on December 2nd, but would appear to have been in error, for some reason, and the latest ‘commit’ is marked ‘Revert’.. The kernel version seems to have been the same, but details are not clear..
Hopefully things will be sorted out, soon..
Robert Gadsdon. December 4th 2012