zkey: Move utility functions into separate source file

As preparation for future changes, move a sysfs specific functions
into a separate source file (utils.c).

Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

zkey/utils.h

@@ -0,0 +1,21 @@
+/*
+ * zkey - Generate, re-encipher, and validate secure keys
+ *
+ * This header file defines the interface to the CCA host library.
+ *
+ * Copyright IBM Corp. 2019
+ *
+ * s390-tools is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See LICENSE for details.
+ */
+
+#ifndef UTILS_H
+#define UTILS_H
+
+#include "lib/zt_common.h"
+
+int sysfs_is_card_online(int card);
+
+int sysfs_is_apqn_online(int card, int domain);
+
+#endif