[Bug target/71763] powerpc64: ICE due to need for output reload on jump

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71763

--- Comment #10 from Michael Meissner <meissner at gcc dot gnu.org> ---
While I prefer fixing the issue in reload, we could disable -mupper-regs-di for
32-bit systems and for power7 systems without direct move