add ptb8

ptb8.json

@@ -2,7 +2,7 @@
     "_description": "PTB Hannig",
     "target": "kasli",
     "variant": "ptb8",
-    "hw_rev": "v2.0.1",
+    "hw_rev": "v2.0",
     "ext_ref_frequency": 10e6,
     "base": "standalone",
     "core_addr": "10.34.16.100",
@@ -53,7 +53,7 @@
           "ports": [7, 8],
           "dds": "ad9912",
           "clk_sel": 2
-        }
+        },
         {
           "type": "zotino",
           "hw_rev": "v1.3",