arch/xtensa: Add GPIO input floating mode in esp32 gpio driver.
arch/xtensa: Add GPIO input floating mode in esp32 gpio driver.

   Add GPIO input floating mode.

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