Staging: rtl8723bs/os_dep: Remove typecast in kfree

Remove typecast of pointer in kfree((u8 *)pdvobj) as
it is not needed.

Found using the following Coccinelle semantic patch:
@@
identifier x;
type t;
@@

-kfree((t *)x)
+kfree(x)
Signed-off-by: Meghana Madhyastha <meghana.madhyastha@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/os_dep/os_intfs.c

@@ -719,7 +719,7 @@ void devobj_deinit(struct dvobj_priv *pdvobj)
 	mutex_destroy(&pdvobj->setch_mutex);
 	mutex_destroy(&pdvobj->setbw_mutex);
 
-	kfree((u8 *)pdvobj);
+	kfree(pdvobj);
 }
 
 u8 rtw_reset_drv_sw(struct adapter *padapter)