[AMDGPU][MC][GFX9] Added buffer_*_format_d16_hi_x

See bug 36835: https://bugs.llvm.org/show_bug.cgi?id=36835

Differential Revision: https://reviews.llvm.org/D44825

Reviewers: artem.tamazov, arsenm, timcorringham

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328707 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed