Add -nodsp flag to nextpnr-xilinx
Add -nodsp flag to nextpnr-xilinx

Signed-off-by: Kamil Rakoczy <539d6a2650324aa9156edbbb09228193dfee5b9b@antmicro.com>

SymbiFlow/fpga-tool-perf,SymbiFlow/fpga-tool-perf,SymbiFlow/fpga-tool-perf,SymbiFlow/fpga-tool-perf