hwrng: amd - remove redundant initialization of variable err

The variable err is being initialized with a value that is
never read and it is being updated later with a new value.  The
initialization is redundant and can be removed

Addresses-Coverity: ("Unused value")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

drivers/char/hw_random/amd-rng.c

@@ -126,7 +126,7 @@ static struct hwrng amd_rng = {
 
 static int __init mod_init(void)
 {
-	int err = -ENODEV;
+	int err;
 	struct pci_dev *pdev = NULL;
 	const struct pci_device_id *ent;
 	u32 pmbase;