drivers/net: return operator cleanup

Change "return (EXPR);" to "return EXPR;"

return is not a function, parentheses are not required.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/bsd_comp.c b/drivers/net/bsd_comp.c
index 88edb98..6e99d80 100644
--- a/drivers/net/bsd_comp.c
+++ b/drivers/net/bsd_comp.c
@@ -429,7 +429,7 @@
 	if (!db->lens)
 	  {
 	    bsd_free (db);
-	    return (NULL);
+	    return NULL;
 	  }
       }
 /*