Handle mixed case in Windows USB ID detection.

Windows XP might use mixed case in hardware ID (VID / PID) string.

Cherry-picked from G#1221.

Change-Id: I86fa63e050cd9b9de5a1beac65b81028e0f86a9d
Signed-off-by: Dominik Riebeling <Dominik.Riebeling@gmail.com>
1 file changed