staging: rtl8723bs: os_dep: Remove typecast in kfree

Remove typecast in the call to kfree as it is not needed.
Issue found using the below coccinelle script,

@@
type t1;
expression e;
@@

-kfree((t1 *)e);
+kfree(e);
Signed-off-by: Nachammai Karuppiah <nachukannan@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Link: https://lore.kernel.org/r/1570511353-64646-1-git-send-email-nachukannan@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c

@@ -165,7 +165,7 @@ static void rtw_spt_band_free(struct ieee80211_supported_band *spt_band)
 			+ sizeof(struct ieee80211_channel)*RTW_2G_CHANNELS_NUM
 			+ sizeof(struct ieee80211_rate)*RTW_G_RATES_NUM;
 	}
-	kfree((u8 *)spt_band);
+	kfree(spt_band);
 }
 
 static const struct ieee80211_txrx_stypes
@@ -1156,7 +1156,7 @@ static int cfg80211_rtw_add_key(struct wiphy *wiphy, struct net_device *ndev,
 	}
 
 addkey_end:
-	kfree((u8 *)param);
+	kfree(param);
 
 	return ret;
 
@@ -2193,7 +2193,7 @@ static int cfg80211_rtw_connect(struct wiphy *wiphy, struct net_device *ndev,
 			ret = -EOPNOTSUPP ;
 		}
 
-		kfree((u8 *)pwep);
+		kfree(pwep);
 
 		if (ret < 0)
 			goto exit;
@@ -2646,7 +2646,7 @@ static int rtw_cfg80211_add_monitor_if (struct adapter *padapter, char *name, st
 
 out:
 	if (ret && mon_wdev) {
-		kfree((u8 *)mon_wdev);
+		kfree(mon_wdev);
 		mon_wdev = NULL;
 	}
 
@@ -3502,7 +3502,7 @@ void rtw_wdev_free(struct wireless_dev *wdev)
 
 	wiphy_free(wdev->wiphy);
 
-	kfree((u8 *)wdev);
+	kfree(wdev);
 }
 
 void rtw_wdev_unregister(struct wireless_dev *wdev)

drivers/staging/rtl8723bs/os_dep/os_intfs.c

@@ -1142,7 +1142,7 @@ void rtw_ndev_destructor(struct net_device *ndev)
 	DBG_871X(FUNC_NDEV_FMT "\n", FUNC_NDEV_ARG(ndev));
 
 	if (ndev->ieee80211_ptr)
-		kfree((u8 *)ndev->ieee80211_ptr);
+		kfree(ndev->ieee80211_ptr);
 }
 
 void rtw_dev_unload(struct adapter *padapter)