Make legacy_or_psa.h public.

As a public header, it should no longer include common.h, just use
build_info.h which is what we actually need anyway.

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/tests/suites/test_suite_pkcs12.function b/tests/suites/test_suite_pkcs12.function
index 34ef090..841bd1d 100644
--- a/tests/suites/test_suite_pkcs12.function
+++ b/tests/suites/test_suite_pkcs12.function
@@ -2,7 +2,7 @@
 #include "mbedtls/pkcs12.h"
 #include "common.h"
 
-#include "legacy_or_psa.h"
+#include "mbedtls/legacy_or_psa.h"
 
 typedef enum
 {