make show_boot_progress () weak.

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/post/post.c b/post/post.c
index 28435cc..4ff75ee 100644
--- a/post/post.c
+++ b/post/post.c
@@ -129,9 +129,7 @@
 				post_log ("PASSED\n");
 			else {
 				post_log ("FAILED\n");
-#ifdef CONFIG_SHOW_BOOT_PROGRESS
-				show_boot_progress(-31);
-#endif
+				show_boot_progress (-31);
 			}
 		}
 	}
@@ -241,9 +239,7 @@
 		} else {
 		if ((*test->test) (flags) != 0) {
 			post_log ("FAILED\n");
-#ifdef CONFIG_SHOW_BOOT_PROGRESS
-			show_boot_progress(-32);
-#endif
+			show_boot_progress (-32);
 		}
 		else
 			post_log ("PASSED\n");