[X86][FastISel] Don't force Nearest-Even rounding for VCVTPS2PH, use MXCSR.

FastISel counterpart to r259448.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@259449 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed