arm64: Fix dangling references to Documentation/arm64

The arm64 documentation has moved under Documentation/arch/; fix up
references in the arm64 subtree to match.

Cc: Will Deacon <will@kernel.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: linux-efi@vger.kernel.org
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

arch/arm64/Kconfig

@@ -1585,7 +1585,7 @@ config ARM64_TAGGED_ADDR_ABI
 	  When this option is enabled, user applications can opt in to a
 	  relaxed ABI via prctl() allowing tagged addresses to be passed
 	  to system calls as pointer arguments. For details, see
-	  Documentation/arm64/tagged-address-abi.rst.
+	  Documentation/arch/arm64/tagged-address-abi.rst.
 
 menuconfig COMPAT
 	bool "Kernel support for 32-bit EL0"
@@ -2047,7 +2047,7 @@ config ARM64_MTE
 	  explicitly opt in. The mechanism for the userspace is
 	  described in:
 
-	  Documentation/arm64/memory-tagging-extension.rst.
+	  Documentation/arch/arm64/memory-tagging-extension.rst.
 
 endmenu # "ARMv8.5 architectural features"
 

arch/arm64/include/asm/efi.h

@@ -88,7 +88,7 @@ efi_status_t __efi_rt_asm_wrapper(void *, const char *, ...);
  * guaranteed to cover the kernel Image.
  *
  * Since the EFI stub is part of the kernel Image, we can relax the
- * usual requirements in Documentation/arm64/booting.rst, which still
+ * usual requirements in Documentation/arch/arm64/booting.rst, which still
  * apply to other bootloaders, and are required for some kernel
  * configurations.
  */

arch/arm64/include/asm/image.h

@@ -27,7 +27,7 @@
 
 /*
  * struct arm64_image_header - arm64 kernel image header
- * See Documentation/arm64/booting.rst for details
+ * See Documentation/arch/arm64/booting.rst for details
  *
  * @code0:		Executable code, or
  *   @mz_header		  alternatively used for part of MZ header

arch/arm64/include/uapi/asm/sigcontext.h

@@ -177,7 +177,7 @@ struct zt_context {
  * vector length beyond its initial architectural limit of 2048 bits
  * (16 quadwords).
  *
- * See linux/Documentation/arm64/sve.rst for a description of the VL/VQ
+ * See linux/Documentation/arch/arm64/sve.rst for a description of the VL/VQ
  * terminology.
  */
 #define SVE_VQ_BYTES		__SVE_VQ_BYTES	/* bytes per quadword */

arch/arm64/kernel/kexec_image.c

@@ -48,7 +48,7 @@ static void *image_load(struct kimage *image,
 
 	/*
 	 * We require a kernel with an unambiguous Image header. Per
-	 * Documentation/arm64/booting.rst, this is the case when image_size
+	 * Documentation/arch/arm64/booting.rst, this is the case when image_size
 	 * is non-zero (practically speaking, since v3.17).
 	 */
 	h = (struct arm64_image_header *)kernel;