net: irda: remove unnecessary platform_set_drvdata()

The driver core clears the driver data to NULL after device_release
or on probe failure, since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d
(device-core: Ensure drvdata = NULL when no driver is bound).
Thus, it is not needed to manually clear the device driver data to NULL.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/irda/bfin_sir.c

@@ -794,7 +794,6 @@ static int bfin_sir_remove(struct platform_device *pdev)
 	kfree(self->rx_buff.head);
 	free_netdev(dev);
 	kfree(sir_port);
-	platform_set_drvdata(pdev, NULL);
 
 	return 0;
 }

drivers/net/irda/sh_irda.c

@@ -838,7 +838,6 @@ static int sh_irda_remove(struct platform_device *pdev)
 	sh_irda_remove_iobuf(self);
 	iounmap(self->membase);
 	free_netdev(ndev);
-	platform_set_drvdata(pdev, NULL);
 
 	return 0;
 }

drivers/net/irda/sh_sir.c

@@ -796,7 +796,6 @@ static int sh_sir_remove(struct platform_device *pdev)
 	sh_sir_remove_iobuf(self);
 	iounmap(self->membase);
 	free_netdev(ndev);
-	platform_set_drvdata(pdev, NULL);
 
 	return 0;
 }