hwmon: Don't access struct mc13783 directly from mc13783-adc

There is a shiny new mc13783 API function that can be used instead.

While at it refactor the code a bit to reduce code duplication a bit.

This removes the last user of <linux/mfd/mc13783-private.h> and so this
include file can go away.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/hwmon/mc13783-adc.c

@@ -18,7 +18,7 @@
  * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#include <linux/mfd/mc13783-private.h>
+#include <linux/mfd/mc13783.h>
 #include <linux/platform_device.h>
 #include <linux/hwmon-sysfs.h>
 #include <linux/kernel.h>
@@ -144,6 +144,14 @@ static const struct attribute_group mc13783_group_ts = {
 	.attrs = mc13783_attr_ts,
 };
 
+static int mc13783_adc_use_touchscreen(struct platform_device *pdev)
+{
+	struct mc13783_adc_priv *priv = platform_get_drvdata(pdev);
+	unsigned flags = mc13783_get_flags(priv->mc13783);
+
+	return flags & MC13783_USE_TOUCHSCREEN;
+}
+
 static int __init mc13783_adc_probe(struct platform_device *pdev)
 {
 	struct mc13783_adc_priv *priv;
@@ -162,10 +170,11 @@ static int __init mc13783_adc_probe(struct platform_device *pdev)
 	if (ret)
 		goto out_err_create1;
 
-	if (!(priv->mc13783->flags & MC13783_USE_TOUCHSCREEN))
+	if (!mc13783_adc_use_touchscreen(pdev)) {
 		ret = sysfs_create_group(&pdev->dev.kobj, &mc13783_group_ts);
 		if (ret)
 			goto out_err_create2;
+	}
 
 	priv->hwmon_dev = hwmon_device_register(&pdev->dev);
 	if (IS_ERR(priv->hwmon_dev)) {
@@ -180,7 +189,7 @@ static int __init mc13783_adc_probe(struct platform_device *pdev)
 
 out_err_register:
 
-	if (!(priv->mc13783->flags & MC13783_USE_TOUCHSCREEN))
+	if (!mc13783_adc_use_touchscreen(pdev))
 		sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_ts);
 out_err_create2:
 
@@ -199,7 +208,7 @@ static int __devexit mc13783_adc_remove(struct platform_device *pdev)
 
 	hwmon_device_unregister(priv->hwmon_dev);
 
-	if (!(priv->mc13783->flags & MC13783_USE_TOUCHSCREEN))
+	if (!mc13783_adc_use_touchscreen(pdev))
 		sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_ts);
 
 	sysfs_remove_group(&pdev->dev.kobj, &mc13783_group);