can: mcp251xfd: mcp251xfd_open(): request IRQ as shared

The driver's IRQ handler supports shared IRQs, so request a shared IRQ
handler.

Link: https://lore.kernel.org/r/20210724205212.737328-1-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c

@@ -2527,8 +2527,8 @@ static int mcp251xfd_open(struct net_device *ndev)
 	can_rx_offload_enable(&priv->offload);
 
 	err = request_threaded_irq(spi->irq, NULL, mcp251xfd_irq,
-				   IRQF_ONESHOT, dev_name(&spi->dev),
-				   priv);
+				   IRQF_SHARED | IRQF_ONESHOT,
+				   dev_name(&spi->dev), priv);
 	if (err)
 		goto out_can_rx_offload_disable;