Staging rtl8172: Remove unnecessary typecast

Using addressof and then casting to the original type is unneeded.
So these casts can be removed.
Issue detected via Coccinelle script.
Signed-off-by: Vatika Harlalka <vatikaharlalka@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/hal_init.c

@@ -92,7 +92,7 @@ static u32 rtl871x_open_fw(struct _adapter *padapter, const u8 **ppmappedfw)
 
 static void fill_fwpriv(struct _adapter *padapter, struct fw_priv *pfwpriv)
 {
-	struct dvobj_priv *pdvobj = (struct dvobj_priv *)&padapter->dvobjpriv;
+	struct dvobj_priv *pdvobj = &padapter->dvobjpriv;
 	struct registry_priv *pregpriv = &padapter->registrypriv;
 
 	memset(pfwpriv, 0, sizeof(struct fw_priv));