scd: Add INTERRUPT endp support to CCID driver.
* scd/app.c (scd_update_reader_status_file): Fix releas of APP. * scd/ccid-driver.c (struct ccid_driver_s): Add INTR_BUF. (intr_cb, ccid_setup_intr): New. (ccid_open_usb_reader): Call ccid_setup_intr. (ccid_slot_status): Return CCID_DRIVER_ERR_NO_READER when removed.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>