cpufreq/zzmoove: change some defaults

- lock to 1 core while sleeping
- change grad_up_threshold
cpufreq: increase pm_lock limit
lowmem_check: build fixes

thanks googyanas!
mdnie: toggle nightmode (red) with home button

- toggle nightmode (red) by pressing the home button 3x as fast as you can
- toggle negative mode by pressing the home button 4x rhythmically