[PATCH -next] libertas: fix non static symbol warning

[weiyj_lk at 163.com]

From: Wei Yongjun <yongjun_wei at trendmicro.com.cn>

Fixes the following sparse warning:

drivers/net/wireless/marvell/libertas/cfg.c:2047:5: warning:
 symbol 'lbs_set_power_mgmt' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <yongjun_wei at trendmicro.com.cn>
---
 drivers/net/wireless/marvell/libertas/cfg.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/marvell/libertas/cfg.c b/drivers/net/wireless/marvell/libertas/cfg.c
index ea48024..7ff2efa 100644
--- a/drivers/net/wireless/marvell/libertas/cfg.c
+++ b/drivers/net/wireless/marvell/libertas/cfg.c
@@ -2044,8 +2044,8 @@ static int lbs_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
 
 
 
-int lbs_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
-		       bool enabled, int timeout)
+static int lbs_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
+			      bool enabled, int timeout)
 {
 	struct lbs_private *priv = wiphy_priv(wiphy);