R600/SI: Add processor type for Hawaii

Patch by: Alex Deucher

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194752 91177308-0d34-0410-b5e6-96231b3b80d8