dw_apb_timer_of.c: remove parts that were picoxcell-specific

[John Stultz]

On 05/07/2013 06:57 AM, Pavel Machek wrote:
>>> So I guess it should go through the timekeeping tree...?
>> I would prefer that, but we can also take it through arm-soc, it doesn't
>> really matter.
> I see no response from timekeeping people... so if you could take it,
> that would be great.

I don't think the original patch ever made it to my inbox.

thanks
-john