This reverts commit 9a9259a78c.
It seems schedtune_init_cgroups and schedtune_boostgroup_init
all call raw_spin_lock_init(&bg->lock), it is wrong.
Change-Id: Icbdfeaf81f4fb59fdcc02623ac5e26d41bd1e496
Signed-off-by: Tao Huang <huangtao@rock-chips.com>