Fix a build break because of a typo in drivers/net/3c503.c

Signed-off-by: Sachin Sant <sachinp@in.ibm.com>
---
diff -Naurp a/drivers/net/3c503.c b/drivers/net/3c503.c
--- a/drivers/net/3c503.c	2009-09-04 15:50:06.000000000 +0530
+++ b/drivers/net/3c503.c	2009-09-04 15:50:41.000000000 +0530
@@ -403,7 +403,7 @@ el2_open(struct net_device *dev)
 		    break;
 	    } else {
 		    if (retval != -EBUSY)
-			    return reval;
+			    return retval;
 	    }
 	} while (*++irqp);
 	if (*irqp == 0) {