[AVX-512] Separate the fadd/fsub/fmul/fdiv/fmax/fmin with rounding mode ISD opcodes into separate packed and scalar opcodes. This is more consistent with the rest of the ISD opcodes. NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296094 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed