beaglebone: adds barebox bootloader

jkt: This is a port of https://patchwork.ozlabs.org/patch/614226/

Change-Id: I646d843fe2b9248d5a2ed3855142f1545b7bab52
Signed-off-by: Jan Kundrát <jan.kundrat@cesnet.cz>
4 files changed
tree: 4796201e1b7f5ede2f135ffcaf08869eb24efbe3
  1. Config.in
  2. board/
  3. configs/
  4. external.desc
  5. external.mk
  6. package/