MIPS: SEAD3: Enable DEVTMPFS

This is similar to 68f30ba7f8b9d666d1218eec97822ade0f23d9c3
"MIPS: Malta: Enable DEVTMPFS"

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6738/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --cc arch/mips/configs/sead3_defconfig
Simple merge

diff --cc arch/mips/configs/sead3micro_defconfig
Simple merge