usb: core: hcd: Modularize HCD stop configuration in usb_stop_hcd()

No functional change. Since configuration to stop HCD is invoked from
multiple places, group all of them in usb_stop_hcd().

Tested-by: Chris Chiu <chris.chiu@canonical.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/20210909064200.16216-4-kishon@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>