fs/dcache.c: adaptive vfs_cache_pressure on suspend / resume

low vfs_cache pressure values save battery while idle, while
a low value also causes stutter with longer up times.
temp control: set a default temperature limit of 70 degrees Celsius

Also set cold_threshold = temp_limit - 3000 instead of - 5000

Conflicts:
	drivers/misc/omap_temp_sensor.c
	drivers/misc/temp_control.c
block/bfq-iosched.c: BFQ scheduler tweaks (thanks pkgnex & Khrushy from Franco dev team)

Also fixed slice_idle limitation (credits to me)
option to disable touch boost