MIPS: Octeon: Remove SYS_HAS_DMA_OPS

The symbol is an orphan, get rid of it.

Signed-off-by: Richard Weinberger <richard@nod.at>
Cc: linux-mips@linux-mips.org (open list:MIPS)
Cc: linux-kernel@vger.kernel.org (open list)
Patchwork: https://patchwork.linux-mips.org/patch/6523/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>