[llvm] [X86] Insert CALLSEQ when lowering GlobalTLSAddress for ELF targets (PR #113706)

[Fabian Ritter via llvm-commits]

ritter-x2a wrote:

> Assuming it's legal, should probably use the entry node as the input chain for the sequence

With my patches so far, every call site of `GetTLSADDR` uses `DAG.getEntryNode()` as chain argument anyway. 426eec65cea888a8b03cc2000c0aa2bb58459ce7 now removes the chain argument and uses `DAG.getEntryNode()` instead.

https://github.com/llvm/llvm-project/pull/113706