libpayload: usb: dwc2: fix short packet transfer

If short packet detected, stop this transfer and return the actual
transferred size

BUG=chrome-os-partner:42817
TEST=Netboot could run well
BRANCH=None

Original-Change-Id: Icb4317f48aa04ac15bb1886b81d2e3c472d123d0
Original-Signed-off-by: Yunzhi Li <lyz@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/288215
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Commit-Queue: Lin Huang <hl@rock-chips.com>
Original-Tested-by: Lin Huang <hl@rock-chips.com>
Original-(cherry picked from commit d372343b4e3d664ce2d76dbf55a5061b5d496bba)
Original-Reviewed-on: https://chromium-review.googlesource.com/291064
Original-Commit-Queue: Julius Werner <jwerner@chromium.org>
Original-Tested-by: Julius Werner <jwerner@chromium.org>

Change-Id: I43d9edffe2074c037f2df203621863e54d2597fa
Signed-off-by: Yunzhi Li <lyz@rock-chips.com>
Reviewed-on: http://review.coreboot.org/11187
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
1 file changed