staging: r8188eu: remove padapter from struct led_priv

The only struct led_priv that's used in the r8188eu driver in embedded in
the driver's global struct adapter. We can use container_of to access the
"outer" structure, there's no need to store a pointer to it.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/20221015151115.232095-9-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_led.c

@@ -59,7 +59,7 @@ static void blink_work(struct work_struct *work)
 {
 	struct delayed_work *dwork = to_delayed_work(work);
 	struct led_priv *pLed = container_of(dwork, struct led_priv, blink_work);
-	struct adapter *padapter = pLed->padapter;
+	struct adapter *padapter = container_of(pLed, struct adapter, ledpriv);
 	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 
 	if (padapter->pwrctrlpriv.rf_pwrstate != rf_on) {
@@ -132,7 +132,6 @@ void rtl8188eu_InitSwLeds(struct adapter *padapter)
 {
 	struct led_priv *pledpriv = &padapter->ledpriv;
 
-	pledpriv->padapter = padapter;
 	ResetLedStatus(pledpriv);
 	INIT_DELAYED_WORK(&pledpriv->blink_work, blink_work);
 }

drivers/staging/r8188eu/include/rtw_led.h

@@ -33,8 +33,6 @@ enum LED_STATE_871x {
 };
 
 struct led_priv {
-	struct adapter *padapter;
-
 	bool bRegUseLed;
 
 	enum LED_STATE_871x	CurrLedState; /*  Current LED state. */