crypto: brcm - add NULL check on of_match_device() return value

Check return value from call to of_match_device()
in order to prevent a NULL pointer dereference.

In case of NULL print error message and return -ENODEV
Signed-off-by: NGustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/bcm/cipher.c

@@ -4813,6 +4813,11 @@ static int spu_dt_read(struct platform_device *pdev)
 	int err;
 
 	match = of_match_device(of_match_ptr(bcm_spu_dt_ids), dev);
+	if (!match) {
+		dev_err(&pdev->dev, "Failed to match device\n");
+		return -ENODEV;
+	}
+
 	matched_spu_type = match->data;
 
 	if (iproc_priv.spu.num_spu > 1) {