BFQ v7r4

Conflicts:
	arch/arm/configs/metallice_grouper_defconfig
	block/Kconfig.iosched
	block/Makefile
	block/bfq-cgroup.c
	block/bfq-ioc.c
	block/bfq-iosched.c
	block/bfq-sched.c
	block/bfq.h
	include/linux/iocontext.h