hwrng: n2-drv - remove casts from void*

Remove unnesessary casts from void*.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c
index 0f9cbf1..101d5f2 100644
--- a/drivers/char/hw_random/n2-drv.c
+++ b/drivers/char/hw_random/n2-drv.c
@@ -387,7 +387,7 @@
 
 static int n2rng_data_read(struct hwrng *rng, u32 *data)
 {
-	struct n2rng *np = (struct n2rng *) rng->priv;
+	struct n2rng *np = rng->priv;
 	unsigned long ra = __pa(&np->test_data);
 	int len;