MIPS: remove duplicate define

This patch removes a duplicate define from
arch/mips/boot/ecoff.h

Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/6081/


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