Revert "arch/arm/lib memst.S --fix bootloop with 4.8 Linaro toolchain"

This reverts commit f0b0f94eff3fabf65881089c934272d623b6a239.
Revert "defconfig update"

This reverts commit 907851ac1dfe0760b20d60435af430348b2160e0.
SR-defconfig