[ARM] Match fminnum/fmaxnum for vector vminnm/vmaxnm instead of an intrinsic

[ARM] Match fminnum/fmaxnum for vector vminnm/vmaxnm instead of an intrinsic

Lower the intrinsic to a FMINNUM/FMAXNUM node and select that instead. This is important because soon SDAG will be able to select FMINNUM/FMAXNUM itself, so we need an integrated lowering path between SDAG and intrinsics.

NFCI.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244592 91177308-0d34-0410-b5e6-96231b3b80d8