MIPS: R3000: Remove redundant parentheses

Signed-off-by: Isamu Mogi <isamu@leafytree.jp>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8292/


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