scd:p15: Improve support for some CardOS based cards.
* scd/iso7816.c (iso7816_read_binary_ext): Add optional arg r_sw and change callers. (iso7816_read_record): Factor all code out to ... (iso7816_read_record_ext): new. * scd/app-p15.c (select_and_read_binary): Fallback to record reading. (read_ef_aodf): Clear EOF error.