Ну вот все сделал по описанию и вот так выходит. Придется вникать.
bitbake core-image-minimal
Loading cache: 100% |################################################################################################################################| ETA: 00:00:00
Loaded 26 entries from dependency cache.
NOTE: Error during finalise of /home/an/yocto/meta-atmel/recipes-kernel/linux/linux-at91_4.1.bb | ETA: --:--:--
NOTE: Error during finalise of /home/an/yocto/meta-atmel/recipes-bsp/at91bootstrap/at91bootstrap_git.bb
ERROR: ExpansionError during parsing /home/an/yocto/meta-atmel/recipes-bsp/at91bootstrap/at91bootstrap_git.bb: Failure expanding variable S: ExpansionError: Failure expanding variable SRCPV, expression was ${@bb.fetch2.get_srcrev(d)} which triggered exception NetworkAccess: Network access disabled through BB_NO_NETWORK (or set indirectly due to use of BB_FETCH_PREMIRRORONLY) but access requested with command git -c core.fsyncobjectfiles=0 ls-remote git://github.com/linux4sam/at91bootstrap.git (for url None)
Summary: There was 1 ERROR message shown, returning a non-zero exit code.