staging: rtl8723bs: remove casts to pointers in kfree

Remove unnecessary casts in pointer types passed to kfree.
Signed-off-by: Wambui Karuga <wambui.karugax@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Link: https://lore.kernel.org/r/20191015112637.20824-1-wambui.karugax@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/core/rtw_mlme.c

@@ -2155,7 +2155,7 @@ sint rtw_set_auth(struct adapter *adapter, struct security_priv *psecuritypriv)
 
 	psetauthparm = rtw_zmalloc(sizeof(struct setauth_parm));
 	if (!psetauthparm) {
-		kfree((unsigned char *)pcmd);
+		kfree(pcmd);
 		res = _FAIL;
 		goto exit;
 	}
@@ -2238,7 +2238,7 @@ sint rtw_set_key(struct adapter *adapter, struct security_priv *psecuritypriv, s
 	if (enqueue) {
 		pcmd = rtw_zmalloc(sizeof(struct cmd_obj));
 		if (!pcmd) {
-			kfree((unsigned char *)psetkeyparm);
+			kfree(psetkeyparm);
 			res = _FAIL;  /* try again */
 			goto exit;
 		}