[mips][sched] Added class for WSBH

Summary:
No functional change since no InstrItinData is provided.

Reviewers: vkalintiris

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D12190


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248257 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed