rtc: s3c: Use generic helper to get driver data

Replace of_match_node() with of_device_get_match_data(), which removes a
few lines of code from the driver.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-s3c.c

@@ -26,6 +26,7 @@
 #include <linux/log2.h>
 #include <linux/slab.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/uaccess.h>
 #include <linux/io.h>
 
@@ -442,16 +443,6 @@ static int s3c_rtc_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static const struct of_device_id s3c_rtc_dt_match[];
-
-static const struct s3c_rtc_data *s3c_rtc_get_data(struct platform_device *pdev)
-{
-	const struct of_device_id *match;
-
-	match = of_match_node(s3c_rtc_dt_match, pdev->dev.of_node);
-	return match->data;
-}
-
 static int s3c_rtc_probe(struct platform_device *pdev)
 {
 	struct s3c_rtc *info = NULL;
@@ -471,7 +462,7 @@ static int s3c_rtc_probe(struct platform_device *pdev)
 	}
 
 	info->dev = &pdev->dev;
-	info->data = s3c_rtc_get_data(pdev);
+	info->data = of_device_get_match_data(&pdev->dev);
 	if (!info->data) {
 		dev_err(&pdev->dev, "failed getting s3c_rtc_data\n");
 		return -EINVAL;