am335x, guardian: boot stage feedback in headless mode

This patch enables the guardian board to provide feedback
  about the boot stage in headless mode. The on-board led
  would behave in the following pattern

    * U-boot -> GLOW LED
    * Linux  -> BLINK LED [HEART-BEAT PATTERN]

Signed-off-by: Moses Christopher <BollavarapuMoses.Christopher@in.bosch.com>
diff --git a/board/bosch/guardian/board.c b/board/bosch/guardian/board.c
index 32ebaf4..03ba9e8 100644
--- a/board/bosch/guardian/board.c
+++ b/board/bosch/guardian/board.c
@@ -14,6 +14,7 @@
 #include <env_internal.h>
 #include <errno.h>
 #include <i2c.h>
+#include <led.h>
 #include <miiphy.h>
 #include <panel.h>
 #include <power/tps65217.h>
@@ -232,6 +233,9 @@
 
 int board_late_init(void)
 {
+#ifdef CONFIG_LED_GPIO
+	led_default_state();
+#endif
 	set_bootmode_env();
 	return 0;
 }