Revert "page_alloc: Make watermarks tunable separately"

This reverts commit 6b351792d5e728f22de69c9c4788ac5ca870b936.
Revert "ksm: check and skip page, if it is already scanned"

This reverts commit 0cddc5edbae47105148f44c7747325c9ee6fa5d4.
cpufreq : include low cpu lock & edit maxscroff
thanks to flar2 & faux123