Read CPU IDs from FDT in tests, so they work under FVP.

Bug: 117551008
Change-Id: I14e24e86631f9e7c16ad69decf676b343ac9f252
diff --git a/test/hftest/linux_main.c b/test/hftest/linux_main.c
index 3cb58d1..6ff258b 100644
--- a/test/hftest/linux_main.c
+++ b/test/hftest/linux_main.c
@@ -15,6 +15,7 @@
  */
 
 #include <stdalign.h>
+#include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>
@@ -54,7 +55,7 @@
 
 		memiter_init(&suite_name, argv[2], strnlen_s(argv[2], 64));
 		memiter_init(&test_name, argv[3], strnlen_s(argv[3], 64));
-		hftest_run(suite_name, test_name);
+		hftest_run(suite_name, test_name, NULL);
 		return;
 	}