USB: serial: qcserial: fix up wording in a comment

Better describe what is happening with a list of devices that are being
ignored by the driver.

Cc: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20200618094300.1887727-5-gregkh@linuxfoundation.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>