usb: host: ehci-msm: Register usb shutdown function

Registering usb_hcd_platform_shutdown to be called during
shutdown. This is a generic function that performs the
generic host stack's shutdown. It ensures that USB
operations do not continue while kexec boots a new kernel.
Signed-off-by: NAzriel Samson <asamson@codeaurora.org>
Signed-off-by: NTimur Tabi <timur@codeaurora.org>
Reviewed-by: NAndy Gross <andy.gross@linaro.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ehci-msm.c

@@ -220,6 +220,7 @@ MODULE_DEVICE_TABLE(of, msm_ehci_dt_match);
 static struct platform_driver ehci_msm_driver = {
 	.probe	= ehci_msm_probe,
 	.remove	= ehci_msm_remove,
+	.shutdown = usb_hcd_platform_shutdown,
 	.driver = {
 		   .name = "msm_hsusb_host",
 		   .pm = &ehci_msm_dev_pm_ops,