jz4740-battery: Add missing kfree(jz_battery) in jz_battery_remove()

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-By: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
diff --git a/drivers/power/jz4740-battery.c b/drivers/power/jz4740-battery.c
index 20c4b95..a8108a7 100644
--- a/drivers/power/jz4740-battery.c
+++ b/drivers/power/jz4740-battery.c
@@ -383,6 +383,7 @@
 
 	iounmap(jz_battery->base);
 	release_mem_region(jz_battery->mem->start, resource_size(jz_battery->mem));
+	kfree(jz_battery);
 
 	return 0;
 }