Revert "acpuclock-8064: fix L2 table look up"

This reverts commit e72064e212f9d168ffae5a2d1bf6ed189ece5588.
Revert "acpuclock-8064: remove 1.2 GHz L2 speed to be in sync with CAF"

This reverts commit 85561b2bc1652b9dfdef559befcb0ad66e0baba9.