UDC: Correct cleaning out memory for string descriptors

BUG=chrome-os-partner:41687
BRANCH=None
TEST=Compiles successfully and fastboot devices reports correct serial
number even after re-connection.

Change-Id: I4741a5d6333523eb47c27b4a20c4ef3f1e853d76
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 6249b1e35391550d788f56a7b3e7a49ae19f0c93
Original-Change-Id: I1348c33f354d11e3c29ccd9da9948cfbeb60aa9e
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/281192
Original-Trybot-Ready: Furquan Shaikh <furquan@chromium.org>
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/10687
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed