release: disable SCU function generator

This code is not ready for release and interferes with the 1w MAC address.
pexarria5: fix numbering of LEDs on baseboard
vetar_top: bug fix, add enable signal for the step-down regulator

the step-down regulator produces -5v needed for the on-board
lemo input.The enable pin was not driven.
Merge branch 'asterisk' into proposed_master
build works for all projects again
Merge branch 'proposed_master' into stefan-wip