[x86] Switch my usage of VariadicFunction to a "normal" variadic
template now that we can use them.

This is, of course, horribly ugly because of the required recursive
formulation. Suggestions for making it less ugly welcome.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229367 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed