Revert "block,elevator: use new hashtable implementation"

This reverts commit 0c30798c58f4fafc1c74b112f8436b602827c631.
Revert "hashtable: introduce a small and naive hashtable"

This reverts commit 5c67935ea706f5341c11a837b507d445da007b1d.
Revert "msm8960: Add 194Mhz frequency step for fast binned CPU as it seems to be very common"

This reverts commit 4b7980bba0b488689041400b46e596cdb10b27fc.