SPCI: Donate memory architected message.

The donate mechnism accepts a single memory region as per the spec but
restrics the number of constituents of this regions to 1.
Multiple constituents will be introduced in a later commit.

Change-Id: I7af9b80068060aedb953d3e204fa3e03c9ccc438
diff --git a/test/hftest/inc/hftest_impl.h b/test/hftest/inc/hftest_impl.h
index 64eeac4..f3eb407 100644
--- a/test/hftest/inc/hftest_impl.h
+++ b/test/hftest/inc/hftest_impl.h
@@ -22,6 +22,8 @@
 #include "hf/spci.h"
 #include "hf/std.h"
 
+#include "vmapi/hf/spci.h"
+
 #define HFTEST_MAX_TESTS 50
 
 /*