usb: cdns3: Corrected comment to align with kernel-doc comment

Minor update in comment.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/1619338565-4574-1-git-send-email-jrdr.linux@gmail.com


Signed-off-by: Peter Chen <peter.chen@kernel.org>