Fix merge error. kernel/sched/energy.c should not build on non-SMP.
Fixes: f9ae5d202b ("Merge branch 'linux-linaro-lsk-v4.4-android' of git://git.linaro.org/kernel/linux-linaro-stable.git")
Change-Id: I5dba90ec363c02e489a48d76bb97f9f9d62827cd
Signed-off-by: Tao Huang <huangtao@rock-chips.com>