remove acpuclock_oc.c
this file isn't needed anymore, as @joilaroi implemented this in acpuclock-7201.c

Change-Id: I5b2d92f12c457f4ae6fa85a85147d72a0739979d
Merge "remove acpuclock_oc.c this file isn't needed anymore, as @joilaroi implemented this in acpuclock-7201.c" into android-4.4