acpuclock: initial overclock to 2.5 Ghz
acpuclock: fix OC for pvs0 - duh stay within voltage constraints
acpuclock: overclock to 2.72Ghz. Finetune later
acpuclock-8974: lower voltage for 300mhz by 25000 - match 8974pro
Revert "acpuclock-8974: lower voltage for 300mhz by 25000 - match 8974pro"

This reverts commit fa23101207026d305642deeb60c4203e551b17a0.
EXPERIMENTAL: acpuclock: tweak L2 bus bw and overclock 2.8ghz slot

* not likely stable for most people
acpuclock: remove L2 tweak but keep 2.8ghz slot