Merge in ICO/coreos from feat/uefi to master
* commit '25ac363358200694e85f9149f2480daec24c5377':
documentation: fix typo
meta-belden-coreos-bsp: add support for EFI and EFI Secure Boot
coreos-doc: use python3-native instead of python3 from the host
meta-belden-coreos-sanity: add some machine configuration checks
meta-belden-coreos-bsp: add the beaglebone machine
meta-belden-coreos-bsp: add beaglebone machine
meta-belden-coreos-bsp: add layer