clang-format: Do not use two-argument/operand special case with no alignment

Without alignment, there is no clean separation between the arguments, even if
there are only two.

Before:
  aaaaaaaaaaaaaa(
      aaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +
          aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);

After:
  aaaaaaaaaaaaaa(aaaaaaaaaaaa,
                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +
                     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);

llvm-svn: 293875