usb: musb: Fix spelling mistake "tranfer" -> "transfer"

Fix spelling mistake "tranfer" -> "transfer" in musb_gadget.c file.
Signed-off-by: Saurav Girepunje <saurav.girepunje@gmail.com>
Link: https://lore.kernel.org/r/20210508072156.GA14656@userSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/musb/musb_gadget.c

@@ -611,7 +611,7 @@ static void rxstate(struct musb *musb, struct musb_request *req)
 	 * mode 0 only. So we do not get endpoint interrupts due to DMA
 	 * completion. We only get interrupts from DMA controller.
 	 *
-	 * We could operate in DMA mode 1 if we knew the size of the tranfer
+	 * We could operate in DMA mode 1 if we knew the size of the transfer
 	 * in advance. For mass storage class, request->length = what the host
 	 * sends, so that'd work.  But for pretty much everything else,
 	 * request->length is routinely more than what the host sends. For