python: fix typo in nvmf_discovery_log

When adding the trtype parser code 'val' is used instead 'tsas'. Use the
correct variable.

Fixes: 86ceb42 ("nvme.i: decode 'tsas' discovery log page entry")
Signed-off-by: Martin Belanger <[email protected]>

Author: Martin Belanger

libnvme/nvme.i

@@ -375,7 +375,7 @@ PyObject *hostid_from_file();
 				break;
 			}
 			PyDict_SetItemStringDecRef(tsas, "cms", val);
-			PyDict_SetItemStringDecRef(entry, "tsas", val);
+			PyDict_SetItemStringDecRef(entry, "tsas", tsas);
 		}
 
 		val = PyLong_FromLong(e->portid);