OMAPDSS: nec-nl8048 panel: remove platform_enable/disable callbacks

The nec-nl8048 panel driver now manages the gpios required to configure the
panel. This was previously done in omap_dss_device's platform_enable/disable
callbacks defined in board files using this panel.

All the board files using this panel now pass the gpio information as platform
data via the panel_nec_nl8048_data struct, which is needed by the panel driver
to configure the gpios connected to the panel. Hence, the
platform_enable/disable ops can be safely removed now.

Signed-off-by: Archit Taneja <archit@ti.com>

drivers/video/omap2/displays/panel-nec-nl8048hl11-01b.c

@@ -133,18 +133,11 @@ static int nec_8048_panel_power_on(struct omap_dss_device *dssdev)
 	if (r)
 		goto err0;
 
-	if (dssdev->platform_enable) {
-		r = dssdev->platform_enable(dssdev);
-		if (r)
-			goto err1;
-	}
-
 	if (gpio_is_valid(pd->res_gpio))
 		gpio_set_value_cansleep(pd->res_gpio, 1);
 
 	return 0;
-err1:
-	omapdss_dpi_display_disable(dssdev);
+
 err0:
 	return r;
 }
@@ -159,9 +152,6 @@ static void nec_8048_panel_power_off(struct omap_dss_device *dssdev)
 	if (gpio_is_valid(pd->res_gpio))
 		gpio_set_value_cansleep(pd->res_gpio, 0);
 
-	if (dssdev->platform_disable)
-		dssdev->platform_disable(dssdev);
-
 	omapdss_dpi_display_disable(dssdev);
 }