cpufreq: Use the new sched/topology header

Most of the toplogy related declarations have been moved
out of include/linux/sched.h. Use the new header.

Change-Id: If7b83d986c14dce58a68a3f89d5f539398661d7e
Signed-off-by: Vikram Mulukutla <markivx@codeaurora.org>
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
Signed-off-by: Jonathan Avila <avilaj@codeaurora.org>