[AVX512] Added VBROADCAST{SS/SD} encoding for VL subset.
Refactored through AVX512_maskable
        


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220908 91177308-0d34-0410-b5e6-96231b3b80d8
[Mips] Add new Mips specific e_flags.

No functional changes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220910 91177308-0d34-0410-b5e6-96231b3b80d8