Merge branch 'DIST2-6' into 'master'

...s/disturb2_unb2b_station/disturb2_unb2b_station.fpga.yaml

...lofar2_unb2b_beamformer/lofar2_unb2b_beamformer.fpga.yaml

...ar2/designs/lofar2_unb2b_ring/lofar2_unb2b_ring.fpga.yaml

...far2_unb2b_sdp_station/lofar2_unb2b_sdp_station.fpga.yaml

...ar2/designs/lofar2_unb2c_ring/lofar2_unb2c_ring.fpga.yaml

...far2_unb2c_sdp_station/lofar2_unb2c_sdp_station.fpga.yaml