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/3c515.c b/drivers/net/3c515.c
index cdf7226..d2bb4b2 100644
--- a/drivers/net/3c515.c
+++ b/drivers/net/3c515.c
@@ -98,7 +98,7 @@
 #define WAIT_TX_AVAIL 200
 
 /* Operational parameter that usually are not changed. */
-#define TX_TIMEOUT  40		/* Time in jiffies before concluding Tx hung */
+#define TX_TIMEOUT  ((4*HZ)/10)	/* Time in jiffies before concluding Tx hung */
 
 /* The size here is somewhat misleading: the Corkscrew also uses the ISA
    aliased registers at <base>+0x400.