[llvm] [AArch64][GlobalISel] Fix miscompile on carry-in selection (PR #68840)

[Tobias Stadler via llvm-commits]

tobias-stadler wrote:

Would it be legal to just add NZCV as implicit-def to the previous G_UADDE/.. to make the dependency explicit? addOperand would place it at the end of the operand array, so I believe it should be ok.

https://github.com/llvm/llvm-project/pull/68840