loopback seems to fully work now
ifconfig bringup helper script
changed dev to dev_src and priv to priv_src
Revert "changed dev to dev_src and priv to priv_src"

This reverts commit 979ded46c76e574eae5f5ed6d6523aeb88e577b1.
removed interrupt function
bypass tx_buffer pointer
removed spinlocks
inlined os_rx
cleanup
cleanup
working as expected now