Revert "kernel: Check HIP support of clang before disabling it"
This reverts commit 62c13743.
Revert "kernel: Force disable LLVM HIP"
This reverts commit ef686781.
Revert "kernel: Force disable LLVM CUDA"
This reverts commit ba14020f.
Change-Id: I5cb2b4624eb0ec25dbc8c1b5888708d961ae59d7