PM: Implement wakelock api.

PM: wakelock: Replace expire work with a timer

The expire work function did not work in the normal case.

Signed-off-by: Arve Hjønnevåg <arve@android.com>
diff --git a/kernel/power/Makefile b/kernel/power/Makefile
index c5ebc6a..e58fcac 100644
--- a/kernel/power/Makefile
+++ b/kernel/power/Makefile
@@ -8,5 +8,6 @@
 obj-$(CONFIG_PM_TEST_SUSPEND)	+= suspend_test.o
 obj-$(CONFIG_HIBERNATION)	+= hibernate.o snapshot.o swap.o user.o \
 				   block_io.o
+obj-$(CONFIG_WAKELOCK)		+= wakelock.o
 
 obj-$(CONFIG_MAGIC_SYSRQ)	+= poweroff.o