[mips] [IAS] Rename getATRegNum and setATReg to {g,s}etATRegIndex. NFC.

Reviewers: dsanders

Reviewed By: dsanders

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8480

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235877 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed