collie: add battery driver

This driver is based on tosa_battery.c.
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index b96f29d..356cdfd 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -24,6 +24,7 @@
 obj-$(CONFIG_BATTERY_PMU)	+= pmu_battery.o
 obj-$(CONFIG_BATTERY_OLPC)	+= olpc_battery.o
 obj-$(CONFIG_BATTERY_TOSA)	+= tosa_battery.o
+obj-$(CONFIG_BATTERY_COLLIE)	+= collie_battery.o
 obj-$(CONFIG_BATTERY_WM97XX)	+= wm97xx_battery.o
 obj-$(CONFIG_BATTERY_BQ27x00)	+= bq27x00_battery.o
 obj-$(CONFIG_BATTERY_DA9030)	+= da9030_battery.o