[X86] Resync Host.cpp with compiler-rt's cpu_model.c to enable 0x55 to be identified as cascadelake when avx512vnni is detected.
[X86] Resync Host.cpp with compiler-rt's cpu_model.c to enable 0x55 to be identified as cascadelake when avx512vnni is detected.

Some other formatting changes.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@362256 91177308-0d34-0410-b5e6-96231b3b80d8

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