Initial GFX12 changes.

Add target gfx1200 to several files.
Add cases for GFX12 in a few switch statements.

Signed-off-by: David Belanger <david.belanger@amd.com>
Change-Id: Ib90032f5b9d5a3306060f13a43d970108a1399df
Signed-off-by: Chris Freehill <cfreehil@amd.com>


[ROCm/ROCR-Runtime commit: 2f14acd9c1]

projects/rocr-runtime/runtime/hsa-runtime/libamdhsacode/amd_hsa_code.cpp

@@ -608,6 +608,7 @@ namespace code {
       case ELF::EF_AMDGPU_MACH_AMDGCN_GFX10_1_GENERIC: MI.Name = "gfx10-1-generic"; MI.XnackSupported = true; MI.SrameccSupported = false; break;
       case ELF::EF_AMDGPU_MACH_AMDGCN_GFX10_3_GENERIC: MI.Name = "gfx10-3-generic"; MI.XnackSupported = false; MI.SrameccSupported = false; break;
       case ELF::EF_AMDGPU_MACH_AMDGCN_GFX11_GENERIC:   MI.Name = "gfx11-generic";   MI.XnackSupported = false; MI.SrameccSupported = false; break;
+      case ELF::EF_AMDGPU_MACH_AMDGCN_GFX1200: MI.Name = "gfx1200"; MI.XnackSupported = false; MI.SrameccSupported = false; break;
       default: return false;
       }
       return true;