Change the PTF code to handle single or multi asic as well.

tests/saitests/py3/sai_qos_tests.py

@@ -3856,8 +3856,20 @@ def runTest(self):
                 self.test_params['dut_username'],
                 self.test_params['dut_password'],
                 cmd)
-            if err != "" and out == "":
-                raise RuntimeError("cmd({}) might have failed in the DUT. Error:{}".format(cmd, err))
+            if err and out == []:
+                if "Invalid value for " in " ".join(err):
+                    cmd = "sudo show platform npu script -s set_scheduler.py"
+                    out, err, ret = self.exec_cmd_on_dut(
+                        self.dst_server_ip,
+                        self.test_params['dut_username'],
+                        self.test_params['dut_password'],
+                        cmd)
+                if err and out == []:
+                    raise RuntimeError("cmd({}) might have failed in the DUT. Error:{}".format(cmd, err))
+                else:
+                    print("Success in setting scheduler in sAsic DUT.", file=sys.stderr)
+            else:
+                print("Success in setting scheduler in mAsic DUT.", file=sys.stderr)
         else:
             # Release port
             self.sai_thrift_port_tx_enable(