New features: Introduce various device attributes to support SDP (FPGA) ring functionality. This includes the following attributes: - FPGA_bf_ring_nof_transport_hops_RW_default - FPGA_ring_node_offset_RW_default - FPGA_ring_nof_nodes_RW_default - FPGA_ring_use_cable_to_next_rn_RW_default - FPGA_ring_use_cable_to_previous_rn_RW_default - FPGA_xst_ring_nof_transport_hops_RW_default These attributes are divided amongst the SDP and Beamlet tango devices.