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>

drivers/net/bmac.c

@@ -1581,7 +1581,7 @@ bmac_proc_info(char *buffer, char **start, off_t offset, int length)
 	int i;
 
 	if (bmac_devs == NULL)
-		return (-ENOSYS);
+		return -ENOSYS;
 
 	len += sprintf(buffer, "BMAC counters & registers\n");