Backport: Using 4.1 version schedulers for 4.2 kernel
	modified:   block/Kconfig.iosched
	modified:   block/Makefile
	new file:   block/bfq-cgroup.c
	new file:   block/bfq-ioc.c
	new file:   block/bfq-iosched.c
	new file:   block/bfq-sched.c
	new file:   block/bfq.h
	modified:   block/blk-ioc.c
	modified:   block/cfq-iosched.c
	new file:   block/row-iosched.c
	modified:   block/scsi_ioctl.c
	new file:   block/sio-iosched.c
	new file:   block/vr-iosched.c