[X86] Bring consistent naming to the SSE/AVX and AVX512 PALIGNR instructions. Then add shuffle decode printing for the EVEX forms which is made easier by having the naming structure more similar to other instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272249 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed