can: hi311x: hi3110_can_probe(): silence clang warning

This patch silences the following clang warning:

| drivers/net/can/spi/hi311x.c:874:17: warning: cast to smaller integer type
| 'enum hi3110_model' from 'const void *' [-Wvoid-pointer-to-enum-cast]
|                 priv->model = (enum hi3110_model)of_id->data;
|                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fixes: 57e83fb9 ("can: hi311x: Add Holt HI-311x CAN driver")
Link: https://lore.kernel.org/r/20210504200520.1179635-3-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/spi/hi311x.c

@@ -871,7 +871,7 @@ static int hi3110_can_probe(struct spi_device *spi)
 		CAN_CTRLMODE_BERR_REPORTING;
 
 	if (of_id)
-		priv->model = (enum hi3110_model)of_id->data;
+		priv->model = (enum hi3110_model)(uintptr_t)of_id->data;
 	else
 		priv->model = spi_get_device_id(spi)->driver_data;
 	priv->net = net;