makefile: add compiler optimization flags
ROW scheduler v4
The ROW I/O scheduler gives priority to READ requests over the WRITE requests
when dispatching, without starving WRITE requests. Requests are kept in
priority queues. Dispatching is done in a RR manner when the dispatch quantum
for each queue is calculated according to queue priority.

Most suitable for mobile devices.
Source : https://patchwork.kernel.org/patch/1862271/
modified for KANG Kernel
Add SIO I/O scheduler
Add Lulzactive Governor
block: row-iosched: fix compilation for 3.0 kernels
defconfig: initial keff defconfig
Revert "makefile: add compiler optimization flags"

This reverts commit bc5eed0f8572871cda34e0ac063e314c8650f077.
Makefile: correct compiler optimization flags