AMDGPU/AMDHSA: Remove GridWorkGroupCountX/Y/Z
and everything that comes with it from implementation
and v3 header files.

Leave definition in v2 header files for backwards
compatibility.

Differential Revision: https://reviews.llvm.org/D48191


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@335267 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed