waterloo: add 1xUrukul, 1xSampler

waterloo.json

@@ -25,6 +25,16 @@
             "dds": "ad9910",
             "ports": [2, 3],
             "clk_sel": 2
+        },
+        {
+            "type": "urukul",
+            "dds": "ad9910",
+            "ports": [4, 5],
+            "clk_sel": 2
+        },
+        {
+            "type": "sampler",
+            "ports": [6, 7]
         }
     ]
 }