gpio-usbselect: Support Host mode role switch as well for IOT platform

Supporting the IOT platform to switch between usb host and device
mode based on the input read from gpio pin. Also provide power-supply
to the device which is connected to the host.

Change-Id: Ifbbe5b10c3fb82d6df870a66694e17e065631c0a
Signed-off-by: Arumuga Durai A <cadurai@codeaurora.org>
Signed-off-by: Manu Gautam <mgautam@codeaurora.org>