crypto: drivers - simplify getting .drvdata

We should get drvdata from struct device directly. Going via
platform_device is an unneeded step back and forth.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/crypto/exynos-rng.c b/drivers/crypto/exynos-rng.c
index 86f5f45..2cfabb9 100644
--- a/drivers/crypto/exynos-rng.c
+++ b/drivers/crypto/exynos-rng.c
@@ -319,8 +319,7 @@ static int exynos_rng_remove(struct platform_device *pdev)
 
 static int __maybe_unused exynos_rng_suspend(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct exynos_rng_dev *rng = platform_get_drvdata(pdev);
+	struct exynos_rng_dev *rng = dev_get_drvdata(dev);
 	int ret;
 
 	/* If we were never seeded then after resume it will be the same */
@@ -350,8 +349,7 @@ static int __maybe_unused exynos_rng_suspend(struct device *dev)
 
 static int __maybe_unused exynos_rng_resume(struct device *dev)
 {
-	struct platform_device *pdev = to_platform_device(dev);
-	struct exynos_rng_dev *rng = platform_get_drvdata(pdev);
+	struct exynos_rng_dev *rng = dev_get_drvdata(dev);
 	int ret;
 
 	/* Never seeded so nothing to do */