[AMDGPU][MC] Added support of 3-element addresses for MIMG instructions

See bug 35999: https://bugs.llvm.org/show_bug.cgi?id=35999

Differential Revision: https://reviews.llvm.org/D45084

Reviewers: artem.tamazov, arsenm, timcorringham

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@329187 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed