crypto: omap - use of_device_get_match_data

The usage of of_device_get_match_data reduce the code size a bit.
Furthermore, it prevents an improbable dereference when
of_match_device() return NULL.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/omap-des.c b/drivers/crypto/omap-des.c
index d37c950..ebc5c0f 100644
--- a/drivers/crypto/omap-des.c
+++ b/drivers/crypto/omap-des.c
@@ -928,16 +928,13 @@
 static int omap_des_get_of(struct omap_des_dev *dd,
 		struct platform_device *pdev)
 {
-	const struct of_device_id *match;
 
-	match = of_match_device(of_match_ptr(omap_des_of_match), &pdev->dev);
-	if (!match) {
+	dd->pdata = of_device_get_match_data(&pdev->dev);
+	if (!dd->pdata) {
 		dev_err(&pdev->dev, "no compatible OF match\n");
 		return -EINVAL;
 	}
 
-	dd->pdata = match->data;
-
 	return 0;
 }
 #else