[X86] EltsFromConsecutiveLoads - replace SmallBitVector with APInt (NFC).

Minor refactor to simplify some incoming patches to improve broadcast loads.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353655 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed