scd: Clean up the structure for future fix of PC/SC.
* scd/apdu.c (struct dev_list): Rename from ccid_table, with void*. (open_ccid_reader): Follow the change. (apdu_dev_list_start, apdu_dev_list_finish): Likewise. (apdu_open_reader): Likewise. * scd/ccid-driver.c (ccid_dev_scan): Use void *. (ccid_dev_scan_finish, ccid_get_BAI, ccid_open_usb_reader): Likewise. * scd/ccid-driver.h: Change the APIs.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>