drm/exynos: Rename display_op power_on to dpms

This patch renames the display_op power_on to dpms to accurately reflect
what the function does.

The side-effect of this patch is that the new hdmi dpms callback is now
invoked twice in the dpms path. This is safe and will be dealt with when
the exynos_drm shim goes away.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index 5912841..cf65f65 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -128,7 +128,7 @@
  * @get_edid: get edid modes from display driver.
  * @get_panel: get panel object from display driver.
  * @check_mode: check if mode is valid or not.
- * @power_on: display device on or off.
+ * @dpms: display device on or off.
  */
 struct exynos_drm_display_ops {
 	enum exynos_drm_output_type type;
@@ -138,7 +138,7 @@
 			struct drm_connector *connector);
 	void *(*get_panel)(struct device *dev);
 	int (*check_mode)(struct device *dev, struct drm_display_mode *mode);
-	int (*power_on)(struct device *dev, int mode);
+	int (*dpms)(struct device *dev, int mode);
 };
 
 /*