FROMGIT: usb: host: xhci-mem: Cleanup pending secondary event ring events

As part of xHCI bus suspend, the xHCI is halted.  However, if there are
pending events in the secondary event ring, it is observed that the xHCI
controller stops responding to further commands upon host or device
initiated bus resume.  Iterate through all pending events and update the
dequeue pointer to the beginning of the event ring.

Tested-by: Puma Hsu <pumahsu@google.com>
Tested-by: Daehwan Jung <dh10.jung@samsung.com>
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20250409194804.3773260-3-quic_wcheng@quicinc.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Bug: 392112015
(cherry picked from commit 5beb4a53
 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git

 usb-next)
Change-Id: I131254b7ce1752eaaa6caa65a6e65691d9a02928
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
Signed-off-by: Carlos Llamas <cmllamas@google.com>