defconfig: enable CLEANCACHE

Change-Id: Id357686427ea7828512805cb12c8da27407b3736
Signed-off-by: zwliew <zhaoweiliew@gmail.com>
cpufreq_conservative: Improve support for micro idle accounting

The minimum samplerate calculations of the current conservative
implementation assume that there is not micro idle accounting present,
however, we do have that capability in our idle estimates.  As a result,
we can support lower polling intervals just like ondemand does.

Change-Id: Icd8d3cd0640ef784b93d8b693ece4e97b9c6fa92
Signed-off-by: zwliew <zhaoweiliew@gmail.com>