saymamaster: add dio

saymamaster.json

@@ -4,6 +4,7 @@
     "hw_rev": "v1.1",
     "base": "master",
     "rtio_frequency": 150e6,
+    "core_addr": "10.34.16.105",
     "peripherals": [
        {
             "type": "urukul",
@@ -11,6 +12,12 @@
             "clk_sel": 2,
             "pll_n": 16,
             "pll_vco": 2
+       },
+       {
+           "type": "dio",
+           "ports": [2],
+           "bank_direction_low": "input",
+           "bank_direction_high": "output"
        }
     ]
 }