Remove definitions of double word shift plus 32 instructions. Assembler or

Remove definitions of double word shift plus 32 instructions. Assembler or
direct-object emitter should emit the appropriate shift instruction depending
on the shift amount.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146893 91177308-0d34-0410-b5e6-96231b3b80d8