LegalizeDAG: Use correct ptr type when expanding unaligned load/store

This fixes regressions exposed in existing AMDGPU tests in a
future commit when all loads are custom lowered.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262299 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed