This reverts commit 034def59.

This is no longer needed since the following commit and to the best
of my knowledge is not relied on by any upstream DTS:

edeec420 (cpufreq: dt-platdev: Automatically create cpufreq
device with OPP v2)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>