Match hidpath with 4 hex-digits vendor id

The pattern "*:*:*.*" will match not only hid path but also other nodes
like "supplier:regulator:regulator.0", and causing the touch firmware
update to fail. Match hid path with 4 hex-digits vendor id.

BUG=b:187129179
TEST=run /opt/google/touch/scripts/chromeos-touch-update-legacy.sh on
     cherry.

Change-Id: I6652bc425c59d7e5de4784acc2dbdfa708faf7d5
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/touch_updater/+/3020403
Tested-by: Chen-Tsung Hsieh <chentsung@chromium.org>
Reviewed-by: Harry Cutts <hcutts@chromium.org>
Commit-Queue: Chen-Tsung Hsieh <chentsung@chromium.org>
1 file changed