[X86][Silvermont] Use correct latency and throughput information for divide and square root in the scheduler model.

Data taken from Table 16-17 in the Intel Optimization Manual.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328962 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed