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>
diff --git a/arch/mips/mach-mt7620/Kconfig b/arch/mips/mach-mt7620/Kconfig
index 13a7bd2..4ebcb4b 100644
--- a/arch/mips/mach-mt7620/Kconfig
+++ b/arch/mips/mach-mt7620/Kconfig
@@ -24,6 +24,7 @@
 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