include: Add IEC binary prefixes in "qemu/units.h"

Loosely based on 076b35b5.
Suggested-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20180625124238.25339-2-f4bug@amsat.org>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

include/qemu/units.h

+/*
+ * IEC binary prefixes definitions
+ *
+ * Copyright (C) 2015 Nikunj A Dadhania, IBM Corporation
+ * Copyright (C) 2018 Philippe Mathieu-Daudé <f4bug@amsat.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef QEMU_UNITS_H
+#define QEMU_UNITS_H
+
+#define KiB     (INT64_C(1) << 10)
+#define MiB     (INT64_C(1) << 20)
+#define GiB     (INT64_C(1) << 30)
+#define TiB     (INT64_C(1) << 40)
+#define PiB     (INT64_C(1) << 50)
+#define EiB     (INT64_C(1) << 60)
+
+#endif