Revert "ARM: makefile: remove march=armv7-a for satisfy targeting MSM Krait CPUs"

This reverts commit dd1b363db2decfc139d3d51d400e6a851760c356.
Revert "makefile: adjust for new toolchain krait optimized"

This reverts commit 90d3b8181e937023f6ae7be0881288fdc1f5bea3.
Revert "makefile: Added 4.8.2 optimizations"

This reverts commit 3d2b6ad7ea14340440adf7406953aeb2466d0cc1.
Revert "Turn off -Wmaybe-uninitialized when building with -Os"

This reverts commit f75055e82897d8c2b30edb95f9b9c65278b2774a.