bootcount: allow to use this feature on TPL

This commit add an option TPL_BOOTCOUNT_LIMIT to
use bootcount on TPL.

Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 835c53d..8b73744 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -837,7 +837,9 @@
 #endif
 }
 
-#if defined(CONFIG_BOOTCOUNT_LIMIT) && !defined(CONFIG_SPL_BOOTCOUNT_LIMIT)
+#if defined(CONFIG_BOOTCOUNT_LIMIT) && \
+	((!defined(CONFIG_TPL_BUILD) && !defined(CONFIG_SPL_BOOTCOUNT_LIMIT)) || \
+	 (defined(CONFIG_TPL_BUILD) && !defined(CONFIG_TPL_BOOTCOUNT_LIMIT)))
 void bootcount_store(ulong a)
 {
 }