[llvm] [SystemZ] Use hasAddressTaken() with verifyNarrowIntegerArgs (NFC). (PR #131039)

[Ulrich Weigand via llvm-commits]

uweigand wrote:

Instead of adding the new map, can't this bit of information be cached in SystemZMachineFunctionInfo?

https://github.com/llvm/llvm-project/pull/131039