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/znet.c b/drivers/net/znet.c
index c3a3292..ae07b3d 100644
--- a/drivers/net/znet.c
+++ b/drivers/net/znet.c
@@ -124,7 +124,7 @@
 #define TX_BUF_SIZE 8192
 #define DMA_BUF_SIZE (RX_BUF_SIZE + 16)	/* 8k + 16 bytes for trailers */
 
-#define TX_TIMEOUT	10
+#define TX_TIMEOUT	(HZ/10)
 
 struct znet_private {
 	int rx_dma, tx_dma;