[llvm] [NVPTX] Fix segfault with i128 types in arrays (PR #120562)

[Artem Belevich via llvm-commits]

Artem-B wrote:

The failed test is `LLVM :: tools/llvm-gsymutil/ARM_AArch64/macho-merged-funcs-dwarf.yaml` and it has nothing to do with this patch. It's Ok to ignore it.

https://github.com/llvm/llvm-project/pull/120562