mips: mt76xx: gardena-smart-gateway: Add board_late_init() to set LED def state

This is needed to set the LEDs automatically to a default state, as
configured in the dts.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

arch/mips/mach-mt7620/Kconfig

@@ -24,6 +24,7 @@ choice
 config BOARD_GARDENA_SMART_GATEWAY_MT7688
 	bool "Gardena Smart Gateway"
 	depends on SOC_MT7620
+	select BOARD_LATE_INIT
 	select SUPPORTS_BOOT_RAM
 	help
 	  Gardena Smart Gateway boards have a MT7688 SoC with 128 MiB of RAM

board/gardena/smart-gateway-mt7688/board.c

@@ -4,6 +4,7 @@
  */
 
 #include <common.h>
+#include <led.h>
 #include <linux/io.h>
 
 #define MT76XX_AGPIO_CFG	0x1000003c
@@ -18,3 +19,11 @@ int board_early_init_f(void)
 
 	return 0;
 }
+
+int board_late_init(void)
+{
+	if (IS_ENABLED(CONFIG_LED))
+		led_default_state();
+
+	return 0;
+}