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/net/ethernet/eth.c b/net/ethernet/eth.c
index 85e7b45..f00ef2f 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -387,6 +387,6 @@
 
 	l = _format_mac_addr(buf, PAGE_SIZE, addr, len);
 	l += scnprintf(buf + l, PAGE_SIZE - l, "\n");
-	return ((ssize_t) l);
+	return (ssize_t)l;
 }
 EXPORT_SYMBOL(sysfs_format_mac);