Revert "Added L2 clock bandwidth boost"

This reverts commit 31b50a945cb73e5f4306e4034974e68e6d7a3b20.
Revert "Added defconfig variable for cpu overclock"

This reverts commit cfb7a47a3159cf7d80567d00d10247e38ae475d3.
Revert "Sebastian FM OC table"

This reverts commit f59e22ac03555e2e85f63123a069b1f7efc180a7.