gallium: Restore VSX for llvm >= 4
Accidentally dropped in 4fdd455e.
Fixes: 4fdd455e ("gallium: Require LLVM >= 3.4) Reported-by: Ilia Mirkin imirkin@alum.mit.edu
Accidentally dropped in 4fdd455e.
Fixes: 4fdd455e ("gallium: Require LLVM >= 3.4) Reported-by: Ilia Mirkin imirkin@alum.mit.edu