logger: reduce ram usage
raised entropy

Conflicts:
	drivers/char/random.c
lowered swap

Conflicts:
	mm/vmscan.c
lowered cache presure
raised readahead
setup defconfig with changed
boost io performance
vfp neon
disabled gentle fair sleeprs and enabled arch power
Enable HAVE_EFFICIENT_UNALIGNED_ACCESS in all Krait cores
tweak smpc