power_supply: Add test_power driver

Just a handy driver that is used for testing purposes.

Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index a82f292..0005080 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -20,6 +20,7 @@
 obj-$(CONFIG_WM831X_BACKUP)	+= wm831x_backup.o
 obj-$(CONFIG_WM831X_POWER)	+= wm831x_power.o
 obj-$(CONFIG_WM8350_POWER)	+= wm8350_power.o
+obj-$(CONFIG_TEST_POWER)	+= test_power.o
 
 obj-$(CONFIG_BATTERY_DS2760)	+= ds2760_battery.o
 obj-$(CONFIG_BATTERY_DS2782)	+= ds2782_battery.o