drivers/net: normalize TX_TIMEOUT

Some network drivers use old TX_TIMEOUT definitions, assuming HZ=100 of
old kernels.

Convert these definitions to include HZ, since HZ can be 1000 these
days.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/atarilance.c b/drivers/net/atarilance.c
index 8cb27cb..ce0091e 100644
--- a/drivers/net/atarilance.c
+++ b/drivers/net/atarilance.c
@@ -116,7 +116,7 @@
 #define RX_RING_LEN_BITS		(RX_LOG_RING_SIZE << 5)
 #define	RX_RING_MOD_MASK		(RX_RING_SIZE - 1)
 
-#define TX_TIMEOUT	20
+#define TX_TIMEOUT	(HZ/5)
 
 /* The LANCE Rx and Tx ring descriptors. */
 struct lance_rx_head {