hwrng: bcm63xx - add device tree support

Adds device tree support for BCM6368, which seems to be the only BCM63xx with
bcm63xx-rng support.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Author: Noltari

drivers/char/hw_random/bcm63xx-rng.c

@@ -130,10 +130,17 @@ static int bcm63xx_rng_probe(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct of_device_id bcm63xx_rng_of_match[] = {
+	{ .compatible = "brcm,bcm6368-rng", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, bcm63xx_rng_of_match);
+
 static struct platform_driver bcm63xx_rng_driver = {
 	.probe		= bcm63xx_rng_probe,
 	.driver		= {
 		.name	= "bcm63xx-rng",
+		.of_match_table = bcm63xx_rng_of_match,
 	},
 };