tools/nolibc: use arm64 name over aarch64

Nolibc generally uses the kernel's architecture names.
aarch64 is the only exception.

Remove the special case.
Nothing changes for the users.

Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250623-nolibc-aarch64-arm64-v1-1-a2892f1c1b27@weissschuh.net
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>

tools/include/nolibc/Makefile

@@ -23,8 +23,7 @@ else
 Q=@
 endif
 
-nolibc_arch := $(patsubst arm64,aarch64,$(ARCH))
-arch_file := arch-$(nolibc_arch).h
+arch_file := arch-$(ARCH).h
 all_files := \
 		compiler.h \
 		crt.h \

tools/include/nolibc/arch-arm64.h

@@ -1,16 +1,16 @@
 /* SPDX-License-Identifier: LGPL-2.1 OR MIT */
 /*
- * AARCH64 specific definitions for NOLIBC
+ * ARM64 specific definitions for NOLIBC
  * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
  */
 
-#ifndef _NOLIBC_ARCH_AARCH64_H
-#define _NOLIBC_ARCH_AARCH64_H
+#ifndef _NOLIBC_ARCH_ARM64_H
+#define _NOLIBC_ARCH_ARM64_H
 
 #include "compiler.h"
 #include "crt.h"
 
-/* Syscalls for AARCH64 :
+/* Syscalls for ARM64 :
  *   - registers are 64-bit
  *   - stack is 16-byte aligned
  *   - syscall number is passed in x8
@@ -150,4 +150,4 @@ void __attribute__((weak, noreturn)) __nolibc_entrypoint __no_stack_protector _s
 	);
 	__nolibc_entrypoint_epilogue();
 }
-#endif /* _NOLIBC_ARCH_AARCH64_H */
+#endif /* _NOLIBC_ARCH_ARM64_H */

tools/include/nolibc/arch.h

@@ -20,7 +20,7 @@
 #elif defined(__ARM_EABI__)
 #include "arch-arm.h"
 #elif defined(__aarch64__)
-#include "arch-aarch64.h"
+#include "arch-arm64.h"
 #elif defined(__mips__)
 #include "arch-mips.h"
 #elif defined(__powerpc__)