ARM: rockchip: build embedded if PM_SLEEP=y

Change-Id: I182ebf684392aed3a264a9d7f0d729031be210e4
Signed-off-by: Tao Huang <huangtao@rock-chips.com>

Author: rkhuangtao

arch/arm/mach-rockchip/Makefile

@@ -4,4 +4,4 @@ obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip.o
 obj-$(CONFIG_PM_SLEEP) += pm.o rk3288_ddr_suspend.o
 obj-$(CONFIG_SMP) += headsmp.o platsmp.o
 
-obj-y += embedded/
+obj-$(CONFIG_PM_SLEEP) += embedded/