llvmpipe: fix compute address bits to return native pointer size.

On 32-bit systems llvm will only be dealing with 32-bit ptrs

Reviewed-by: Karol Herbst <kherbst@redhat.com>
Cc: mesa-stable
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21601>
(cherry picked from commit 53dda476a9e33503432b1f2d0b7da814377bb848)
2 files changed