bootstage: Convert progress numbers 1-9 into enums

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/ivm/ivm.c b/board/ivm/ivm.c
index 9bec198..71d64d4 100644
--- a/board/ivm/ivm.c
+++ b/board/ivm/ivm.c
@@ -322,7 +322,7 @@
 			(status < 0) ? STATUS_LED_ON : STATUS_LED_OFF);
 # endif	/* STATUS_LED_YELLOW */
 # if defined(STATUS_LED_BOOT)
-	if (status == 6)
+	if (status == BOOTSTAGE_ID_DECOMP_IMAGE)
 		status_led_set (STATUS_LED_BOOT, STATUS_LED_OFF);
 # endif	/* STATUS_LED_BOOT */
 #endif /* CONFIG_STATUS_LED */