[FS#628] rt2x00: Frame received with unrecognized signal

[LEDE Bugs]

The following task is now closed:

FS#628 - rt2x00: Frame received with unrecognized signal
User who did this - Yousong Zhou (yousong)

Reason for closing: Not a bug
Additional comments about closing: Feel free to add further info if the issue persists.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=628