defconfig: sm8150: enable cpufreq stats config

Currently, can't get cpufreq stats in sysfs node of cpufreq/stat,
and this sysfs is signifcant for debug and test. So eanble it.

Change-Id: I9691ca1b474e1bd582eb7635f39a33df6cdfc86b
Signed-off-by: yonghaih <yonghaih@codeaurora.org>