platform: msm_shared: add secure random value for canary

Add scm call for secure random value in lk.
Use secure random value for canary.

CRs-Fixed: 671500
Change-Id: Iafd3a89d7051ee44b02fba8de77e6c38d52210d0
diff --git a/include/platform/debug.h b/include/platform/debug.h
index e99aed7..e4ab0b6 100644
--- a/include/platform/debug.h
+++ b/include/platform/debug.h
@@ -26,6 +26,7 @@
 #include <sys/types.h>
 #include <stdarg.h>
 #include <compiler.h>
+#include <scm.h>
 
 #if defined(__cplusplus)
 extern "C" {