Revert "Introduce timer slack controller"

This reverts commit 6bb14e86cfa4833e7ed2d815affd28764f86efa0.
Revert "Proportional Rate Reduction for TCP"

This reverts commit 9dee15c4ca99794f80dbbc353c475651837e689a.
Revert "Added optimized ARM RWSEM algorithm"

This reverts commit 72bb89dede62de43ed7f14530e8e377245c7def5.
Updates to Makefile and defconfig for JB4.3

Based on optimizations by Evisceration