USB: chipidea: re-order irq handling to avoid unhandled irqs

USB: chipidea: re-order irq handling to avoid unhandled irqs

- let role driver handle irq before ID change check; this gives the
  role driver a chance to handle disconnect;
- disable irq during switch role; no role driver to handle irq in
  the period.

Tested-by: Michael Grzeschik <[email protected]>
Tested-by: Marc Kleine-Budde <[email protected]>
Signed-off-by: Richard Zhao <[email protected]>
Signed-off-by: Alexander Shishkin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>