Support: Return ScaledNumbers::MaxScale from getQuotient()

Return MaxScale now that it's available.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211559 91177308-0d34-0410-b5e6-96231b3b80d8
BFI: Remove more float-like language from ScaledNumber

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211560 91177308-0d34-0410-b5e6-96231b3b80d8
BFI: Un-floatify more language

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211561 91177308-0d34-0410-b5e6-96231b3b80d8