staging: rtl8723bs: convert function to static

function chk_sta_is_alive() is used only inside core/rtw_ap.c so remove the prototype and convert it to static.

Signed-off-by Fabio Aiuto <[email protected]>

---
 drivers/staging/rtl8723bs/core/rtw_ap.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

drivers/staging/rtl8723bs/core/rtw_ap.c +1 -2

index 23bbdf084631..3e2d8b735fc8 100644
@@ -164,8 +164,7 @@ static void update_BCNTIM(struct adapter *padapter)
 	pnetwork_mlmeext->IELength = offset + remainder_ielen;
 }
 
-u8 chk_sta_is_alive(struct sta_info *psta);
-u8 chk_sta_is_alive(struct sta_info *psta)
+static u8 chk_sta_is_alive(struct sta_info *psta)
 {
 	sta_update_last_rx_pkts(psta);