R600/SI: Prettier operand printing for 64-bit ops.

Copy what is done for 32-bit already so the order is about the same.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211186 91177308-0d34-0410-b5e6-96231b3b80d8
R600/SI: Add intrinsics for brev instructions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211187 91177308-0d34-0410-b5e6-96231b3b80d8