cpufreq: record CPUFREQ stat for fast switch path

Original CPUFREQ stat recording is only for slow path, add it for
fast path.

Change-Id: I6f66cd686e6e96c4381db332600da60cbd399033
Signed-off-by: yonghaih <yonghaih@codeaurora.org>
[shalagra@codeaurora.org: Fixed trivial merge conflicts in port to 5.x]
Signed-off-by: Shaleen Agrawal <shalagra@codeaurora.org>