Merge pull request #182 from gsomlo/gls-nexys4-eth-fixup

boards/nexys4ddr: ethernet support fix-up

litex/boards/targets/nexys4ddr.py

@@ -102,9 +102,12 @@ def main():
     parser = argparse.ArgumentParser(description="LiteX SoC on Nexys4DDR")
     builder_args(parser)
     soc_sdram_args(parser)
+    parser.add_argument("--with-ethernet", action="store_true",
+                        help="enable Ethernet support")
     args = parser.parse_args()
 
-    soc = BaseSoC(**soc_sdram_argdict(args))
+    cls = EthernetSoC if args.with_ethernet else BaseSoC
+    soc = cls(**soc_sdram_argdict(args))
     builder = Builder(soc, **builder_argdict(args))
     builder.build()