defconfig: 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 enable it for sdmsteppe, atoll, sm8150, trinket targets.

Change-Id: I339ec5dc1619d359faa5323708eef9a73ede6adb
Signed-off-by: Naitik Bharadiya <bharad@codeaurora.org>