staging: ced401: fix double unlock bug

After spin_lock() is called, all of if-else conditions in this brace
should reach the end of else and spin_unlock() must be called.
So It doesn't need to call spin_unlock() without a return statement
for handling an error.

Also sparse says:
drivers/staging/ced1401/usb1401.c:1080:28: warning:
context imbalance in 'Handle1401Esc' - unexpected unlock

Reviewed-by: Dan Carpenter <[e-mail]>
Signed-off-by: Daeseok Youn <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/ced1401/usb1401.c

···
 				/*  This can never happen, really */
 				dev_err(&pdx->interface->dev,
 					"ERROR: DMA setup while transfer still waiting\n");
-				spin_unlock(&pdx->stagedLock);
 			} else {
 				if ((wTransType == TM_EXTTOHOST)
 				    || (wTransType == TM_EXTTO1401)) {