staging: r8188eu: Replace wrapper rtw_yield_os

a simple yield() is sufficient.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_mlme_ext.c

@@ -6333,7 +6333,7 @@ unsigned int send_beacon(struct adapter *padapter)
 		issue_beacon(padapter, 100);
 		issue++;
 		do {
-			rtw_yield_os();
+			yield();
 			rtw_hal_get_hwreg(padapter, HW_VAR_BCN_VALID, (u8 *)(&bxmitok));
 			poll++;
 		} while ((poll%10) != 0 && !bxmitok && !padapter->bSurpriseRemoved && !padapter->bDriverStopped);

drivers/staging/rtl8188eu/hal/rtl8188e_cmd.c

@@ -655,7 +655,7 @@ _func_enter_;
 			SetFwRsvdPagePkt(adapt, false);
 			DLBcnCount++;
 			do {
-				rtw_yield_os();
+				yield();
 				/* mdelay(10); */
 				/*  check rsvd page download OK. */
 				rtw_hal_get_hwreg(adapt, HW_VAR_BCN_VALID, (u8 *)(&bcn_valid));

drivers/staging/rtl8188eu/include/osdep_service.h

@@ -277,8 +277,6 @@ void rtw_sleep_schedulable(int ms);
 
 u32  rtw_atoi(u8 *s);
 
-void rtw_yield_os(void);
-
 static inline unsigned char _cancel_timer_ex(struct timer_list *ptimer)
 {
 	return del_timer_sync(ptimer);

drivers/staging/rtl8188eu/os_dep/osdep_service.c

@@ -245,11 +245,6 @@ void rtw_sleep_schedulable(int ms)
 		return;
 }
 
-void rtw_yield_os(void)
-{
-	yield();
-}
-
 #define RTW_SUSPEND_LOCK_NAME "rtw_wifi"
 
 inline void rtw_suspend_lock_init(void)