[AArch64] Add support for NEON scalar floating-point to integer convert
instructions.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@195789 91177308-0d34-0410-b5e6-96231b3b80d8
Remove unused entity from .td file.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@195792 91177308-0d34-0410-b5e6-96231b3b80d8