Add efinix ddio primitives

src/io/rtl/taxi_oddr.sv

@@ -109,6 +109,19 @@ end else if (!SIM && VENDOR == "ALTERA") begin
         .dataout(q)
     );
 
+end else if (VENDOR == "EFINIX") begin
+    for (genvar n = 0; n < WIDTH; n = n + 1) begin : IDDIO_LOOP
+        EFX_ODDIO #(
+            .IS_CLK_INVERTED(0),
+            .MODE("DDIO_RESYNC")
+        ) u_oddio (
+            .I_HI(d1[n]),
+            .I_LO(d2[n]),
+            .O(q[n]),
+            .CLK(clk)
+        );
+    end
+
 end else begin
     // generic/simulation implementation (no vendor primitives)