cpufreq_conservative: Bump default frequency step up to 10 from 5

Based on a better understanding of how the governor operates,
this is a better choice on most Exynos devices.

Change-Id: I8ed87e2b61f621138aa5a20951d8a70037e986a9
Signed-off-by: Andrew Dodd <atd7@cornell.edu>
Merge "cpufreq_conservative: Bump default frequency step up to 10 from 5" into cm-10.1