usb-device: Raise RuntimeError when DCD error occurs.

So the behavior matches the comment.

Signed-off-by: Hyx <[email protected]>

Author: hyx0329

micropython/usb/usb-device/manifest.py

@@ -1,2 +1,2 @@
-metadata(version="0.2.0")
+metadata(version="0.2.1")
 package("usb")

micropython/usb/usb-device/usb/device/core.py

@@ -600,7 +600,8 @@ def submit_xfer(self, ep_addr, data, done_cb=None):
         # function has returned to the caller.
         if not self._open:
             raise RuntimeError("Not open")
-        _dev._submit_xfer(ep_addr, data, done_cb)
+        if not _dev._submit_xfer(ep_addr, data, done_cb):
+            raise RuntimeError("DCD error")
 
     def stall(self, ep_addr, *args):
         # Set or get the endpoint STALL state.