usb: dwc2: Fix spelling mistake "schduler" -> "scheduler"

There is a spelling mistakes in dev_warn messages. Fix them.

Signed-off-by: Deming Wang <wangdeming@inspur.com>
Link: https://lore.kernel.org/r/20230325063832.1642-1-wangdeming@inspur.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>