Adapt libraries installation

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/Makefile b/Makefile
index 3f62b66..0f1f3da 100644
--- a/Makefile
+++ b/Makefile
@@ -96,7 +96,7 @@
 	mkdir -p $(DESTDIR)/include/mbedtls
 	cp -rp include/mbedtls $(DESTDIR)/include
 	mkdir -p $(DESTDIR)/include/psa
-	cp -rp include/psa $(DESTDIR)/include
+	cp -rp tf-psa-crypto/include/psa $(DESTDIR)/include
 
 	mkdir -p $(DESTDIR)/lib
 	cp -RP library/libmbedtls.*    $(DESTDIR)/lib