Remove '+' symbol from kernel version string

Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>
block: add BFQv6 again

Conflicts:
	block/Makefile
	include/linux/cgroup_subsys.h
defconfig: enable bfq