drm: tilcdc: don't use devm_pinctrl_get_select_default() in probe

Since commit ab78029 ("drivers/pinctrl: grab default handles from
device core"), we can rely on device core for setting the default pins.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230922073714.6164-1-wsa+renesas@sang-engineering.com

Author: Wolfram Sang

drivers/gpu/drm/tilcdc/tilcdc_panel.c

@@ -6,7 +6,6 @@
 
 #include <linux/backlight.h>
 #include <linux/gpio/consumer.h>
-#include <linux/pinctrl/consumer.h>
 #include <linux/platform_device.h>
 
 #include <video/display_timing.h>
@@ -308,7 +307,6 @@ static int panel_probe(struct platform_device *pdev)
 	struct backlight_device *backlight;
 	struct panel_module *panel_mod;
 	struct tilcdc_module *mod;
-	struct pinctrl *pinctrl;
 	int ret;
 
 	/* bail out early if no DT data: */
@@ -342,10 +340,6 @@ static int panel_probe(struct platform_device *pdev)
 
 	tilcdc_module_init(mod, "panel", &panel_module_ops);
 
-	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
-	if (IS_ERR(pinctrl))
-		dev_warn(&pdev->dev, "pins are not configured\n");
-
 	panel_mod->timings = of_get_display_timings(node);
 	if (!panel_mod->timings) {
 		dev_err(&pdev->dev, "could not get panel timings\n");