hwrng: n2-drv - fix typo

Fixes: 3e75241b ("hwrng: drivers - Use device-managed registration API")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/n2-drv.c

@@ -768,7 +768,7 @@ static int n2rng_probe(struct platform_device *op)
 	np->hwrng.data_read = n2rng_data_read;
 	np->hwrng.priv = (unsigned long) np;
 
-	err = devm_hwrng_register(&pdev->dev, &np->hwrng);
+	err = devm_hwrng_register(&op->dev, &np->hwrng);
 	if (err)
 		goto out_hvapi_unregister;