Add HVC/SMC call for debug logging.

Bug: 115484857
Change-Id: I253adf03ebde97d4b620be9d3f2cc05f5265f45d
diff --git a/inc/hf/dlog.h b/inc/hf/dlog.h
index 3e83624..01dddd9 100644
--- a/inc/hf/dlog.h
+++ b/inc/hf/dlog.h
@@ -18,6 +18,8 @@
 
 #include <stdarg.h>
 
+#include "vm.h"
+
 #if DEBUG
 void dlog_enable_lock(void);
 void dlog(const char *fmt, ...);
@@ -27,3 +29,5 @@
 #define dlog(...)
 #define vdlog(fmt, args)
 #endif
+
+void dlog_flush_vm_buffer(struct vm_locked vm);