bootstage: Convert progress numbers 1-9 into enums

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/bf533-stamp/bf533-stamp.c b/board/bf533-stamp/bf533-stamp.c
index b1134e9..07a988a 100644
--- a/board/bf533-stamp/bf533-stamp.c
+++ b/board/bf533-stamp/bf533-stamp.c
@@ -91,27 +91,27 @@
 void show_boot_progress(int status)
 {
 	switch (status) {
-	case 1:
+	case BOOTSTAGE_ID_CHECK_MAGIC:
 		stamp_led_set(STATUS_LED_OFF, STATUS_LED_OFF, STATUS_LED_ON);
 		break;
-	case 2:
+	case BOOTSTAGE_ID_CHECK_HEADER:
 		stamp_led_set(STATUS_LED_OFF, STATUS_LED_ON, STATUS_LED_OFF);
 		break;
-	case 3:
+	case BOOTSTAGE_ID_CHECK_CHECKSUM:
 		stamp_led_set(STATUS_LED_OFF, STATUS_LED_ON, STATUS_LED_ON);
 		break;
-	case 4:
+	case BOOTSTAGE_ID_CHECK_ARCH:
 		stamp_led_set(STATUS_LED_ON, STATUS_LED_OFF, STATUS_LED_OFF);
 		break;
-	case 5:
-	case 6:
+	case BOOTSTAGE_ID_CHECK_IMAGETYPE:
+	case BOOTSTAGE_ID_DECOMP_IMAGE:
 		stamp_led_set(STATUS_LED_ON, STATUS_LED_OFF, STATUS_LED_ON);
 		break;
-	case 7:
-	case 8:
+	case BOOTSTAGE_ID_KERNEL_LOADED:
+	case BOOTSTAGE_ID_CHECK_BOOT_OS:
 		stamp_led_set(STATUS_LED_ON, STATUS_LED_ON, STATUS_LED_OFF);
 		break;
-	case 9:
+	case BOOTSTAGE_ID_BOOT_OS_RETURNED:
 	case 10:
 	case 11:
 	case 12: