defconfig: sa8155: Enable support for UVC devices

Enable USB Video Class (UVC) device support and media drivers for
USB bus for enabling video input devices, such as camera streamers
over USB

Change-Id: Iaf883bdc2d726a851f7fc954f5acc9f0086015d4
Signed-off-by: Bharathraj Nagaraju <snbraj@codeaurora.org>