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/lance.c b/drivers/net/lance.c
index f06296b..02336ed 100644
--- a/drivers/net/lance.c
+++ b/drivers/net/lance.c
@@ -207,7 +207,7 @@
 #define LANCE_BUS_IF 0x16
 #define LANCE_TOTAL_SIZE 0x18
 
-#define TX_TIMEOUT	20
+#define TX_TIMEOUT	(HZ/5)
 
 /* The LANCE Rx and Tx ring descriptors. */
 struct lance_rx_head {