Add flag indicating that this impl doesn't require /data.

This is a prerequisite for hardware-backed FDE.

Change-Id: I28c3fe8495d70f54097a6750f8dd27a3613b85d3
diff --git a/keymaster_qcom.cpp b/keymaster_qcom.cpp
index 77831b6..d9dec09 100644
--- a/keymaster_qcom.cpp
+++ b/keymaster_qcom.cpp
@@ -767,7 +767,7 @@
     dev->common.version = 1;
     dev->common.module = (struct hw_module_t*) module;
     dev->common.close = qcom_km_close;
-    dev->flags = 0;
+    dev->flags = KEYMASTER_BLOBS_ARE_STANDALONE;
 
     dev->generate_keypair = qcom_km_generate_keypair;
     dev->import_keypair = qcom_km_import_keypair;