[AMDGPU][MC][GFX9] Added s_call_b64

See bug 36843: https://bugs.llvm.org/show_bug.cgi?id=36843

Differential Revision: https://reviews.llvm.org/D45268

Reviewers: artem.tamazov, arsenm, timcorringham

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@329440 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed