Revert "ARM: 7173/1: Add optimised swahb32() byteswap helper for v6 and above"

This reverts commit 84a451581aeea116d426aa2bd2b43563f24e8745.
Revert "defconfig: enable cgroup timer slack"

This reverts commit 066990fbdf112482343eecc023647237b1d1906f.
Revert "fs: jbd2: backport from aosp-common-3.4-kernel (johnnyslt)"

This reverts commit f9ce69c194f318f719951b36a1900963b9aaed80.