usb: gadget: uvc: Add support for UVC 1.5

Add UVC 1.5 specification support for the existing
peripheral UVC function driver.
Also add support for H264 format streaming.

Change-Id: I3efe7db77793990ce76af7dcc566f91daeb05436
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>