[AMDGPU][MC] Corrected dst/data size for MIMG opcodes with d16 modifier

See bug 36154: https://bugs.llvm.org/show_bug.cgi?id=36154

Differential Revision: https://reviews.llvm.org/D42847

Reviewers: cfang, artem.tamazov, arsenm

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@324237 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed