[AArch64] Wrong CC access in CSINC-conditional branch sequence

This is a follow up to commit r219742. It removes the CCInMI variable
and accesses the CC in CSCINC directly. In the case of a conditional
branch accessing the CC with CCInMI was wrong.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219748 91177308-0d34-0410-b5e6-96231b3b80d8