atm: use for_each_set_bit()

Replace open-coded loop with for_each_set_bit().
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/atm/lanai.c

@@ -306,11 +306,10 @@ static void vci_bitfield_iterate(struct lanai_dev *lanai,
 	const unsigned long *lp,
 	void (*func)(struct lanai_dev *,vci_t vci))
 {
-	vci_t vci = find_first_bit(lp, NUM_VCI);
-	while (vci < NUM_VCI) {
+	vci_t vci;
+
+	for_each_set_bit(vci, lp, NUM_VCI)
 		func(lanai, vci);
-		vci = find_next_bit(lp, NUM_VCI, vci + 1);
-	}
 }
 
 /* -------------------- BUFFER  UTILITIES: */