[lld] [LLD][COFF] Fix tailMergeARM64 delayload thunk 128 MB range limitation (PR #161844)

[Martin Storsjö via llvm-commits]

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

This LGTM, but I'd leave it open for comments from others as well, in particular if @cjacek has some arm64ec specific concern.

https://github.com/llvm/llvm-project/pull/161844