drm/panel: JDI LT070ME05000 simplify with dev_err_probe()

Use the dev_err_probe() helper to simplify error handling during probe.
This also handle scenario, when EDEFER is returned and useless error is printed.

Fixes error:
panel-jdi-lt070me05000 4700000.dsi.0: cannot get enable-gpio -517

Signed-off-by: David Heidelberg <[email protected]>
---
v2:
 - original v1 patch name "drm/panel: JDI LT070ME05000 remove useless warning"
 - use dev_err_probe function

drivers/gpu/drm/panel/panel-jdi-lt070me05000.c

@@ -400,38 +400,30 @@ static int jdi_panel_add(struct jdi_panel *jdi)
 
 	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(jdi->supplies),
 				      jdi->supplies);
-	if (ret < 0) {
-		dev_err(dev, "failed to init regulator, ret=%d\n", ret);
-		return ret;
-	}
+	if (ret < 0)
+		return dev_err_probe(dev, ret,
+				     "failed to init regulator, ret=%d\n", ret);
 
 	jdi->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
 	if (IS_ERR(jdi->enable_gpio)) {
-		ret = PTR_ERR(jdi->enable_gpio);
-		dev_err(dev, "cannot get enable-gpio %d\n", ret);
-		return ret;
+		return dev_err_probe(dev, PTR_ERR(jdi->enable_gpio),
+				     "cannot get enable-gpio %d\n", ret);
 	}
 
 	jdi->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
-	if (IS_ERR(jdi->reset_gpio)) {
-		ret = PTR_ERR(jdi->reset_gpio);
-		dev_err(dev, "cannot get reset-gpios %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(jdi->reset_gpio))
+		return dev_err_probe(dev, PTR_ERR(jdi->reset_gpio),
+				     "cannot get reset-gpios %d\n", ret);
 
 	jdi->dcdc_en_gpio = devm_gpiod_get(dev, "dcdc-en", GPIOD_OUT_LOW);
-	if (IS_ERR(jdi->dcdc_en_gpio)) {
-		ret = PTR_ERR(jdi->dcdc_en_gpio);
-		dev_err(dev, "cannot get dcdc-en-gpio %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(jdi->dcdc_en_gpio))
+		return dev_err_probe(dev, PTR_ERR(jdi->dcdc_en_gpio),
+				     "cannot get dcdc-en-gpio %d\n", ret);
 
 	jdi->backlight = drm_panel_create_dsi_backlight(jdi->dsi);
-	if (IS_ERR(jdi->backlight)) {
-		ret = PTR_ERR(jdi->backlight);
-		dev_err(dev, "failed to register backlight %d\n", ret);
-		return ret;
-	}
+	if (IS_ERR(jdi->backlight))
+		return dev_err_probe(dev, PTR_ERR(jdi->backlight),
+				     "failed to register backlight %d\n", ret);
 
 	drm_panel_init(&jdi->base, &jdi->dsi->dev, &jdi_panel_funcs,
 		       DRM_MODE_CONNECTOR_DSI);