MIPS: Loongson64: Cleanup unused code

Clean up legacy code after stripping out Loongson2ef code.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: paul.burton@mips.com
35 files changed