Documentation: cpu-freq: cpu-drivers: Fix repetition of word 'to'

The patch replaces 'to to' with 'to' in the documentation.

Signed-off-by: sayli karnik <karniksayli1995@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>