hwrng: bcm63xx - 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>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/bcm63xx-rng.c

@@ -137,7 +137,6 @@ static int bcm63xx_rng_probe(struct platform_device *pdev)
 out_clk_disable:
 	clk_disable(clk);
 out_free_rng:
-	platform_set_drvdata(pdev, NULL);
 	kfree(rng);
 out_free_priv:
 	kfree(priv);
@@ -154,7 +153,6 @@ static int bcm63xx_rng_remove(struct platform_device *pdev)
 	clk_disable(priv->clk);
 	kfree(priv);
 	kfree(rng);
-	platform_set_drvdata(pdev, NULL);
 
 	return 0;
 }