[clang] [llvm] [PowerPC] Take ABI into account for data layout (PR #149725)

[Alex Rønne Petersen via cfe-commits]

alexrp wrote:

>From https://sourceware.org/glibc/wiki/ABIList#powerpc (emphasis mine):

> (The GCC distinction for 64-bit is actually ELFv1/ELFv2, **but the BE ELFv2 and LE ELFv1 combinations aren't supported**.)

Is this no longer the case?

https://github.com/llvm/llvm-project/pull/149725