deadline: Allow 0ms deadline latency, increase the read speed

Change a timer compare from after to after-equals, thus allowing
0 timeout and making deadline schedule FIFO.

Signed-off-by: xiaobing tu <xiaobing.tu@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
deadline: tweak generally recommended for SSDs
clock-krait/cpufreq: custom voltage control v1

* TODO: control only available frequencies
Arm/dts: oc to 2.72 Ghz
Thanks to @imoseyon.
Arm/dts: update regulator voltages
cpufreq: don't go above 2.27ghz when adding device