mfd: mc13xxx-spi/wm831x-spi: Use spi_get_device_match_data()

Use preferred spi_get_device_match_data() instead of of_match_device() and
spi_get_device_id() to get the driver match data. With this, adjust the
includes to explicitly include the correct headers.

Signed-off-by: Rob Herring <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Lee Jones <[e-mail]>

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drivers/mfd/mc13xxx-spi.c

···
  */
 
 #include <linux/slab.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
 #include <linux/mfd/core.h>
 #include <linux/mfd/mc13xxx.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/err.h>
 #include <linux/spi/spi.h>
 
···
 		return ret;
 	}
 
-	if (spi->dev.of_node) {
-		const struct of_device_id *of_id =
-			of_match_device(mc13xxx_dt_ids, &spi->dev);
-
-		mc13xxx->variant = of_id->data;
-	} else {
-		const struct spi_device_id *id_entry = spi_get_device_id(spi);
-
-		mc13xxx->variant = (void *)id_entry->driver_data;
-	}
+	mc13xxx->variant = spi_get_device_match_data(spi);
 
 	return mc13xxx_common_init(&spi->dev);
 }

drivers/mfd/wm831x-spi.c

···
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/pm.h>
 #include <linux/spi/spi.h>
 #include <linux/regmap.h>
···
 static int wm831x_spi_probe(struct spi_device *spi)
 {
 	struct wm831x_pdata *pdata = dev_get_platdata(&spi->dev);
-	const struct spi_device_id *id = spi_get_device_id(spi);
-	const struct of_device_id *of_id;
 	struct wm831x *wm831x;
 	enum wm831x_parent type;
 	int ret;
 
-	if (spi->dev.of_node) {
-		of_id = of_match_device(wm831x_of_match, &spi->dev);
-		if (!of_id) {
-			dev_err(&spi->dev, "Failed to match device\n");
-			return -ENODEV;
-		}
-		type = (uintptr_t)of_id->data;
-	} else {
-		type = (enum wm831x_parent)id->driver_data;
+	type = (uintptr_t)spi_get_device_match_data(spi);
+	if (!type) {
+		dev_err(&spi->dev, "Failed to match device\n");
+		return -ENODEV;
 	}
 
 	wm831x = devm_kzalloc(&spi->dev, sizeof(struct wm831x), GFP_KERNEL);