Pattern generator and chipboard buffers control
Added pattern generator control (from https://gitlab.cern.ch/Caribou/peary-firmware-modules/-/tree/master/pattern_generator) and the chipboard buffers control (power down, pre-emphasis)
Added pattern generator control (from https://gitlab.cern.ch/Caribou/peary-firmware-modules/-/tree/master/pattern_generator) and the chipboard buffers control (power down, pre-emphasis)