Boot: Align MCUboot to the latest version

Signed-off-by: Sherry Zhang <sherry.zhang2@arm.com>
Co-authored-by: Tamas Ban <tamas.ban@arm.com>
Change-Id: I256ab23d330bd45a93ff33f0cd93e45822c0ed2f
diff --git a/bl2/ext/mcuboot/include/fih.h b/bl2/ext/mcuboot/include/fih.h
index 5331dbb..20cb3b2 100644
--- a/bl2/ext/mcuboot/include/fih.h
+++ b/bl2/ext/mcuboot/include/fih.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2022, Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2023, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -20,11 +20,11 @@
 #include "stdint.h"
 
 /*
- * FIH return type macro changes the function return types to fih_int.
+ * FIH return type macro changes the function return types to fih_ret.
  * All functions that need to be protected by FIH and called via FIH_CALL must
- * return a fih_int type.
+ * return a fih_ret type.
  */
-#define FIH_RET_TYPE(type)    fih_int
+#define FIH_RET_TYPE(type)    fih_ret
 
 #include "bootutil/fault_injection_hardening.h"