mm: SLQB memory allocator

Since Mali OSK memory allocation failure has been fixed.
I would like to give SLQB which Ezekeel always uses a try.
defconfig: Switch to SLQB
Revert "board-janice: Increase BASEFREQ of mxT224E"

This reverts commit 04baaef18509de3e33f27bbce006dc68a0566da7.

Some users reported that it messes up touchscreen with a charger attched.

For me, no such issue at all.
cypress-touchkey: Turn on LED when LED is enabled
mm/uksm: Disabled by default
mm/uksm: Switch to LOW governor
cypress-touchkey: Short wakelock name
Signed-off-by: cocafe <cocafehj@gmail.com>
mxt224e: Short wakelock name
Signed-off-by: cocafe <cocafehj@gmail.com>
defconfig: version tag 8.6 -> 8.6.4

Just to specialize version.

Fixes update.