Revert "usb: dwc3: gadget: Clear req->needs_extra_trb flag on cleanup"

Revert "usb: dwc3: gadget: Clear req->needs_extra_trb flag on cleanup"

This reverts commit 25ad17d692ad54c3c33b2a31e5ce2a82e38de14e,
as we will be cherry-picking a number of changes from upstream
that allows us to later cherry-pick the same fix from upstream
rather than using this modified backported version.

Cc: Fei Yang <fei.yang@intel.com>
Cc: Sam Protsenko <semen.protsenko@linaro.org>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: linux-usb@vger.kernel.org
Cc: stable@vger.kernel.org # 4.19.y
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>