[AVX512] Fix typo in r226298
[AVX512] Fix typo in r226298

Hal noticed that the double/float got mixed up on the parameters for
these.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@258108 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang