board: dh_stm32mp1: update the gpio hog support

This patch update the current gpio hog implementation with
the new API gpio_hog_probe_all() activated with CONFIG_GPIO_HOG.
Signed-off-by: NPatrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: NPatrice Chotard <patrice.chotard@st.com>

board/dhelectronics/dh_stm32mp1/board.c

@@ -523,17 +523,11 @@ static void board_init_fmc2(void)
 /* board dependent setup after realloc */
 int board_init(void)
 {
-	struct udevice *dev;
-
 	/* address of boot parameters */
 	gd->bd->bi_boot_params = STM32_DDR_BASE + 0x100;
 
-	/* probe all PINCTRL for hog */
-	for (uclass_first_device(UCLASS_PINCTRL, &dev);
-	     dev;
-	     uclass_next_device(&dev)) {
-		pr_debug("probe pincontrol = %s\n", dev->name);
-	}
+	if (CONFIG_IS_ENABLED(DM_GPIO_HOG))
+		gpio_hog_probe_all();
 
 	board_key_check();