[X86] Remove check for AVX512 support from skylake-avx512 detection in getHostCPUName.
[X86] Remove check for AVX512 support from skylake-avx512 detection in getHostCPUName.

Users of getHostCPUName should also use getHostCPUFeatures which will take care of making sure avx512 is disabled if the CPU doesn't support it. This is consistent with what we do for other CPUs.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@307495 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-llvm,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,llvm-mirror/llvm