ipw2100: fix timeout bug - always evaluated to 0

commit 2c86c275015c ("Add ipw2100 wireless driver.") introduced
HW_PHY_OFF_LOOP_DELAY (HZ / 5000) which always evaluated to 0. Clarified
by Stanislav Yakovlev <stas.yakovlev@gmail.com> that it should be 50
milliseconds thus fixed up to msecs_to_jiffies(50).

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Acked-by: Stanislav Yakovlev <stas.yakovlev@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ipw2x00/ipw2100.c

@@ -1410,7 +1410,7 @@ static int ipw2100_power_cycle_adapter(struct ipw2100_priv *priv)
 static int ipw2100_hw_phy_off(struct ipw2100_priv *priv)
 {
 
-#define HW_PHY_OFF_LOOP_DELAY (HZ / 5000)
+#define HW_PHY_OFF_LOOP_DELAY (msecs_to_jiffies(50))
 
 	struct host_command cmd = {
 		.host_command = CARD_DISABLE_PHY_OFF,