bootstage: Replace show_boot_progress/error() with bootstage_...()

These calls should not be made directly any more, since bootstage
will call the show_boot_...() functions as needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/nds32/lib/bootm.c b/arch/nds32/lib/bootm.c
index 5ae90fb..03f58bf 100644
--- a/arch/nds32/lib/bootm.c
+++ b/arch/nds32/lib/bootm.c
@@ -69,7 +69,7 @@
 		printf("Using machid 0x%x from environment\n", machid);
 	}
 
-	show_boot_progress(BOOTSTAGE_ID_RUN_OS);
+	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
 
 	debug("## Transferring control to Linux (at address %08lx) ...\n",
 	       (ulong)theKernel);