[lld] [llvm] [AArch64][llvm-objdump] Fix arm64_32 symbolization (PR #171164)

[Daniel Rodríguez Troitiño via llvm-commits]

https://github.com/drodriguez approved this pull request.

LGTM.

Not sure if the names of `LLVMDisassembler_ReferenceType_In_ARM64_ADDXri`, `LLVMDisassembler_ReferenceType_In_ARM64_LDRXui` and `LLVMDisassembler_ReferenceType_In_ARM64_LDRXl` should be changed to reflect that they do not only apply to those extended register instructions and also to the wide registers, but I cannot imagine a good name that makes it clear.

https://github.com/llvm/llvm-project/pull/171164