docs: arm64: Move arm64 documentation under Documentation/arch/

Architecture-specific documentation is being moved into Documentation/arch/
as a way of cleaning up the top-level documentation directory and making
the docs hierarchy more closely match the source hierarchy.  Move
Documentation/arm64 into arch/ (along with the Chinese equvalent
translations) and fix up documentation references.

Cc: Will Deacon <[email protected]>
Cc: Alex Shi <[email protected]>
Cc: Hu Haowen <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Reviewed-by: Yantengsi <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>

Author: Jonathan Corbet

Documentation/ABI/testing/sysfs-devices-system-cpu

@@ -670,7 +670,7 @@ Description:	Preferred MTE tag checking mode
 		"async"	  	  Prefer asynchronous mode
 		================  ==============================================
 
-		See also: Documentation/arm64/memory-tagging-extension.rst
+		See also: Documentation/arch/arm64/memory-tagging-extension.rst
 
 What:		/sys/devices/system/cpu/nohz_full
 Date:		Apr 2015

Documentation/admin-guide/kernel-parameters.txt

@@ -304,7 +304,7 @@
 			EL0 is indicated by /sys/devices/system/cpu/aarch32_el0
 			and hot-unplug operations may be restricted.
 
-			See Documentation/arm64/asymmetric-32bit.rst for more
+			See Documentation/arch/arm64/asymmetric-32bit.rst for more
 			information.
 
 	amd_iommu=	[HW,X86-64]