[AArch64] Move feature predctrl to predres

Follow up patch of rL350385, for adding predres
command line option. This patch renames the
feature as to keep it aligned with the option
passed by/to clang

Differential Revision: https://reviews.llvm.org/D56484


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@350702 91177308-0d34-0410-b5e6-96231b3b80d8
8 files changed