[AMDGPU] Some code cleaning in SIRegisterInfo.td

Reviewers: tstellarAMD, vpykhtin

Subscribers: arsenm, kzhuravl

Differential Revision: https://reviews.llvm.org/D22620

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276274 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed