platform: Define new apis to add support for boot timestamps

Change-Id: I85ed05329899323e22e2dbbc7ff307308d543bdd
diff --git a/platform/init.c b/platform/init.c
index be48ad6..a809501 100644
--- a/platform/init.c
+++ b/platform/init.c
@@ -92,6 +92,12 @@
 {
 }
 
-__WEAK void bs_set_timestamp(enum bs_entry bs_id)
+__WEAK addr_t get_bs_info_addr()
 {
+	return NULL;
+}
+
+__WEAK uint32_t platform_get_sclk_count(void)
+{
+	return 0;
 }