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.