[X86] Teach fast isel to use MOV32ri64 for loading an unsigned 32 immediate into a 64-bit register.

Previously we used SUBREG_TO_REG+MOV32ri. But regular isel was changed recently to use the MOV32ri64 pseudo. Fast isel now does the same.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@342788 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed