cpufreq: Documentation: Fix cpufreq_frequency_table name

At few places in documentation cpufreq_frequency_table is written as
cpufreq_freq_table. Fix these.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --cc Documentation/cpu-freq/cpu-drivers.txt
Simple merge