backlight: vgg2432a4: convert vgg2432a4_driver to dev_pm_ops

Instead of using legacy suspend/resume methods, using newer dev_pm_ops
structure allows better control over power management. Also, use of
pm_message_t is deprecated. Thus, it is removed.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/video/backlight/ili9320.c b/drivers/video/backlight/ili9320.c
index c3a5299..f8be90c 100644
--- a/drivers/video/backlight/ili9320.c
+++ b/drivers/video/backlight/ili9320.c
@@ -270,27 +270,21 @@
 }
 EXPORT_SYMBOL_GPL(ili9320_remove);
 
-#ifdef CONFIG_PM
-int ili9320_suspend(struct ili9320 *lcd, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+int ili9320_suspend(struct ili9320 *lcd)
 {
 	int ret;
 
-	dev_dbg(lcd->dev, "%s: event %d\n", __func__, state.event);
+	ret = ili9320_power(lcd, FB_BLANK_POWERDOWN);
 
-	if (state.event == PM_EVENT_SUSPEND) {
-		ret = ili9320_power(lcd, FB_BLANK_POWERDOWN);
-
-		if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP) {
-			ili9320_write(lcd, ILI9320_POWER1, lcd->power1 |
-				      ILI9320_POWER1_SLP |
-				      ILI9320_POWER1_DSTB);
-			lcd->initialised = 0;
-		}
-
-		return ret;
+	if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP) {
+		ili9320_write(lcd, ILI9320_POWER1, lcd->power1 |
+			      ILI9320_POWER1_SLP |
+			      ILI9320_POWER1_DSTB);
+		lcd->initialised = 0;
 	}
 
-	return 0;
+	return ret;
 }
 EXPORT_SYMBOL_GPL(ili9320_suspend);