bq27x00_battery: Call power_supply_changed only when capacity changed

In current driver, power_supply_changed() is called whenever any of
the battery attribute changed. This causes kernel to increases the
'/sys/power/wakeup_count' and make suspend not working correctly.

This patch change this behavior to call power_supply_changed()
only when the battery capacity changed.

Signed-off-by: Puthikorn Voravootivat <puthik@chromium.org>
Reviewed-by: David Riley <davidriley@chromium.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

drivers/power/bq27x00_battery.c

@@ -497,10 +497,11 @@ static void bq27x00_update(struct bq27x00_device_info *di)
 			di->charge_design_full = bq27x00_battery_read_ilmd(di);
 	}
 
-	if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) {
-		di->cache = cache;
+	if (di->cache.capacity != cache.capacity)
 		power_supply_changed(&di->bat);
-	}
+
+	if (memcmp(&di->cache, &cache, sizeof(cache)) != 0)
+		di->cache = cache;
 
 	di->last_update = jiffies;
 }