[Bug libgcc/98952] powerpc*: __trampoline_setup inverted test for trampoline size

[segher at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98952

--- Comment #2 from Segher Boessenkool <segher at gcc dot gnu.org> ---
And after that it always copies r4 bytes, too (rounded down to a multiple
of four bytes).