ARM: AMx3xx: Make FIT boot as default boot on HS devices

Verification has to be done before booting any images on HS devices. So
default the boot to FIT on HS devices.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/ti/am43xx/board.c b/board/ti/am43xx/board.c
index ba6f88f..390cc16 100644
--- a/board/ti/am43xx/board.c
+++ b/board/ti/am43xx/board.c
@@ -632,6 +632,13 @@
 {
 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 	set_board_info_env(NULL);
+
+	/*
+	 * Default FIT boot on HS devices. Non FIT images are not allowed
+	 * on HS devices.
+	 */
+	if (get_device_type() == HS_DEVICE)
+		setenv("boot_fit", "1");
 #endif
 	return 0;
 }