acpuclock-8x60: add L2_FREQ_FIXUP flag

 - to change low freqs handling that causes crashes on some devices

Change-Id: I05b09d6ab23df8fb0a46a596c236f6eb4f0b0d3e
hercules: update config

Change-Id: Ifb613d858178db01b58623559ef13ed5a3031b13