hafnium: Fix build when _Noreturn is not available

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: Jon Mason <jon.mason@arm.com>
Cc: Ross Burton <ross.burton@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm/recipes-bsp/hafnium/hafnium/0001-define-_Noreturn-if-needed.patch

@@ -0,0 +1,33 @@
+From 0d941ba32a082023575fd0d14d52a12b7547b367 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Tue, 19 Apr 2022 22:32:56 -0700
+Subject: [PATCH] define _Noreturn if needed
+
+The new _Noreturn function specifier is not recognized by the parser and shows as a syntax error:
+
+Fixes
+../git/inc/hf/panic.h:13:1: error: '_Noreturn' is a C11 extension [-Werror,-Wc11-extensions]
+noreturn void panic(const char *fmt, ...);
+^
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ inc/hf/panic.h | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/inc/hf/panic.h b/inc/hf/panic.h
+index ec864e4f..588f1193 100644
+--- a/inc/hf/panic.h
++++ b/inc/hf/panic.h
+@@ -10,4 +10,8 @@
+ 
+ #include <stdnoreturn.h>
+ 
++#ifndef _Noreturn
++#define _Noreturn __attribute__ ((noreturn))
++#endif
++
+ noreturn void panic(const char *fmt, ...);
+-- 
+2.36.0
+

meta-arm/recipes-bsp/hafnium/hafnium_2.6.bb

@@ -10,6 +10,7 @@ PACKAGE_ARCH = "${MACHINE_ARCH}"
 inherit deploy python3native pkgconfig
 
 SRC_URI = "gitsm://git.trustedfirmware.org/hafnium/hafnium.git;protocol=https;branch=master \
+           file://0001-define-_Noreturn-if-needed.patch \
            file://host-ld.patch \
            file://pkg-config-native.patch \
            file://native-dtc.patch"