The naming convention of this driver was always under the scanner, people
complained that it should have a more generic name than cpu0, as it manages all
CPUs that are sharing clock lines.

Also, in future it will be modified to support any number of clusters with
separate clock/voltage lines.

Lets rename it to 'cpufreq_dt' from 'cpufreq_cpu0'.
Tested-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

This patch is based on feedback from Viresh Kumar.
Since cpufreq-cpu0 driver has already check opp table, there is no
need to same check in mach-shmobile.
Signed-off-by: NGaku Inami <gaku.inami.xw@bp.renesas.com>
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

I add a new file(cpufreq.c) for the following reasons.
- Registration of platform_device must be unified in SH-Mobile.
- We can't create a node of cpufreq drivers into device tree.
  (Because cpufreq driver is virtual device.)
Signed-off-by: NGaku Inami <gaku.inami.xw@bp.renesas.com>
Acked-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>