llvmpipe: only include old Transform includes when needed

This fixes building with recent LLVM where these 2 .h files
were removed.

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/8671
Acked-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22980>
Change-Id: I64e0af95fdd1fe7c81c4b654fa22031609e7eb4e
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/mesa/+/912522
Commit-Queue: Josh Gargus <jjosh@google.com>
Reviewed-by: John Bauman <jbauman@google.com>
1 file changed