fix openpilot board flashing

board/tools/enter_download_mode.py

@@ -11,12 +11,9 @@ def enter_download_mode(device):
 
   try:
     handle.controlWrite(usb1.TYPE_VENDOR | usb1.RECIPIENT_DEVICE, 0xd1, 0, 0, b'')
-  except usb1.USBErrorIO as e:
-    print("Device download mode enabled.")
-    time.sleep(1)
-  else:
-    print("Device failed to enter download mode.")
-    sys.exit(1)
+  except Exception:
+    pass
+  time.sleep(1)
 
 def find_first_panda(context=None):
   context = context or usb1.USBContext()