usb: gadget: Fixes enumeration failure on Windows 10

Fixes USB Video function(UVC 1.5) enumeartion failure
on Windows 10 by updating the processing unit descriptor
of UVC class from 1.1 to 1.5. Changes the SAR width
and SAR height attributes of H.264 frame descriptors
to a non zero value as Windows 10 expects a non-zero
value without which the video function enumeration fails.

Change-Id: I5e1f0bd10e94b3a081d6607a1287f3cb4d3b5c41
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>