powerpc/8xx: Update defconfigs

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --cc arch/powerpc/configs/adder875_defconfig
Simple merge

diff --cc arch/powerpc/configs/ep88xc_defconfig
Simple merge

diff --cc arch/powerpc/configs/mgsuvd_defconfig
Simple merge

diff --cc arch/powerpc/configs/mpc866_ads_defconfig
Simple merge

diff --cc arch/powerpc/configs/mpc885_ads_defconfig
Simple merge