crypto: artpec6 - Simplify with of_device_get_match_data()

Driver's probe function matches against driver's of_device_id table, so
of_match_node() can be simplified with of_device_get_match_data().

This requires changing the enum used in the driver match data entries to
non-zero, to be able to recognize error case of
of_device_get_match_data().

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Author: krzk

drivers/crypto/axis/artpec6_crypto.c

@@ -252,7 +252,7 @@ struct artpec6_crypto_dma_descriptors {
 };
 
 enum artpec6_crypto_variant {
-	ARTPEC6_CRYPTO,
+	ARTPEC6_CRYPTO = 1,
 	ARTPEC7_CRYPTO,
 };
 
@@ -2842,7 +2842,6 @@ MODULE_DEVICE_TABLE(of, artpec6_crypto_of_match);
 
 static int artpec6_crypto_probe(struct platform_device *pdev)
 {
-	const struct of_device_id *match;
 	enum artpec6_crypto_variant variant;
 	struct artpec6_crypto *ac;
 	struct device *dev = &pdev->dev;
@@ -2853,12 +2852,10 @@ static int artpec6_crypto_probe(struct platform_device *pdev)
 	if (artpec6_crypto_dev)
 		return -ENODEV;
 
-	match = of_match_node(artpec6_crypto_of_match, dev->of_node);
-	if (!match)
+	variant = (enum artpec6_crypto_variant)of_device_get_match_data(dev);
+	if (!variant)
 		return -EINVAL;
 
-	variant = (enum artpec6_crypto_variant)match->data;
-
 	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);