cpts: Fix build error caused by include of plat/clock.h

On Thu, Dec 13, 2012 at 01:36:41PM -0800, Tony Lindgren wrote:

Commit 87c0e764 (cpts: introduce time stamping code and a PTP hardware clock)
mistakenly included plat/clock.h that should not be included by drivers
even if it exists.

Hasn't this already been fixed?

  https://patchwork.kernel.org/patch/1810481/
  http://www.spinics.net/lists/linux-omap/msg83132.html

Thanks,
Richard