msm: kgsl: Remove io_fraction as it is no longer used

io_fraction was originally used as a way to influence the CPU
frequency governor.  Due to governor updates and timing changes
no targets use io_fraction now and there is no plan to do so in
the future.

Signed-off-by: Lucille Sylvester <lsylvest@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
msm8974: Add GPU frequency steps (533 + 650)Mhz :) Thanks @neobuddy89

*Fixed show low OFF freq (27Mhz) then GPU is in SLAMBER mode (off/waiting).
*Fixed thermal pwr level preventing of using max 650Mhz
This also allowed to use higher GPU FREQ as 450Mhz on HIGH temp.
before we got only 320/389 max on > 70c
This added +3~5C to max TEMP. so i see 77C~78C with high 3D pressure.
MSM THERMAL, rules! and keep the CPU safe. :) no problem.
*Allowed IDLE/INIT GPU Freq to 100Mhz. was 200. this will reduce battery usage.
*Tuned BUS freq power for all GPu freqs.
drivers: gpu: do not initialize/allow slumber level

* Min level cannot be slumber level.
* Thanks @dorimanx

(num_pwrlevels - 1)  => Slumber Level -> 27 MHz
(num_pwrlevels - 2)  => Min Level -> 100 Mhz (after we added freq steps)

Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
KGSL: GPU kgsl_pwrctrl.c use min pwr level as default. to reduce battery drain.