atm: idt77252: Use generic SKB queue management instead of home-grown scheme.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/atm/idt77252.h b/drivers/atm/idt77252.h
index e83eaf1..5042bb2 100644
--- a/drivers/atm/idt77252.h
+++ b/drivers/atm/idt77252.h
@@ -173,10 +173,8 @@
 };
 
 struct rx_pool {
-	struct sk_buff		*first;
-	struct sk_buff		**last;
+	struct sk_buff_head	queue;
 	unsigned int		len;
-	unsigned int		count;
 };
 
 struct aal1 {