arch/amebad/flash : Apply bytewrite function
arch/amebad/flash : Apply bytewrite function

RTL8021x didn't implement bytewrite, so add it to increase performance

Samsung/TizenRT,sunghan-chang/TizenRT,jeongchanKim/TizenRT,junmin-kim/TizenRT,jeongchanKim/TizenRT,pillip8282/TizenRT,junmin-kim/TizenRT,pillip8282/TizenRT,an4967/TizenRT,junmin-kim/TizenRT,pillip8282/TizenRT,jeongchanKim/TizenRT,jeongchanKim/TizenRT,Samsung/TizenRT,Samsung/TizenRT,an4967/TizenRT,pillip8282/TizenRT,jeongchanKim/TizenRT,Samsung/TizenRT,jsdosa/TizenRT,Samsung/TizenRT,jeongarmy/TizenRT,jeongchanKim/TizenRT,jsdosa/TizenRT,Samsung/TizenRT,jeongarmy/TizenRT,jeongarmy/TizenRT,sunghan-chang/TizenRT,sunghan-chang/TizenRT,jeongarmy/TizenRT,jeongarmy/TizenRT,sunghan-chang/TizenRT,jeongchanKim/TizenRT,Samsung/TizenRT,an4967/TizenRT,jeongarmy/TizenRT,jsdosa/TizenRT,jsdosa/TizenRT,jsdosa/TizenRT,an4967/TizenRT,sunghan-chang/TizenRT,an4967/TizenRT,pillip8282/TizenRT,jsdosa/TizenRT,sunghan-chang/TizenRT,an4967/TizenRT,junmin-kim/TizenRT,pillip8282/TizenRT,jsdosa/TizenRT,junmin-kim/TizenRT,junmin-kim/TizenRT,an4967/TizenRT,pillip8282/TizenRT,jeongarmy/TizenRT,sunghan-chang/TizenRT,junmin-kim/TizenRT