Set port_id for Verific bus ports

Author: rocallahan

frontends/verific/verific.cc

@@ -1576,6 +1576,7 @@ void VerificImporter::import_netlist(RTLIL::Design *design, Netlist *nl, std::ma
 		SetIter si ;
 		Port *port ;
 		FOREACH_PORT_OF_PORTBUS(portbus, si, port) {
+			wire->port_id = nl->IndexOf(port) + 1;
 			import_attributes(wire->attributes, port->GetNet(), nl, portbus->Size());
 			break;
 		}

tests/verific/port_bus_order.ys

@@ -0,0 +1,13 @@
+verific -sv <<EOT
+module simple (
+  input  [3:0] I2,
+  input  [3:0] I1,
+  output [3:0] result
+);
+  assign result = I2 & I1;
+endmodule
+EOT
+verific -import simple
+
+write_verilog verilog_port_bus_order.out
+!grep -qF 'simple(I2, I1, result)' verilog_port_bus_order.out