power: supply: bq27xxx: Update comments

The URL of bq27441-g1 and bq27426 are missing and bq27520-g4 is duplicated.
Signed-off-by: Liu Xiang <liu.xiang6@zte.com.cn>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Acked-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>

drivers/power/supply/bq27xxx_battery.c

@@ -26,7 +26,6 @@
  * http://www.ti.com/product/bq27510-g1
  * http://www.ti.com/product/bq27510-g2
  * http://www.ti.com/product/bq27510-g3
- * http://www.ti.com/product/bq27520-g4
  * http://www.ti.com/product/bq27520-g1
  * http://www.ti.com/product/bq27520-g2
  * http://www.ti.com/product/bq27520-g3
@@ -40,7 +39,9 @@
  * http://www.ti.com/product/bq27545-g1
  * http://www.ti.com/product/bq27421-g1
  * http://www.ti.com/product/bq27425-g1
+ * http://www.ti.com/product/bq27426
  * http://www.ti.com/product/bq27411-g1
+ * http://www.ti.com/product/bq27441-g1
  * http://www.ti.com/product/bq27621-g1
  */