scd: Improve --enable-pinpad-varlen.
* tools/gpgconf-comp.c (gc_options_scdaemon): Add enable-pinpad-varlen. * scd/apdu.c (check_pcsc_pinpad): Detect SPRx32 reader.
(cherry picked from commit 7bde2bf3b0ddb5d3515a44879e1a7ddb581a5c0b)
- Signed-off-by: Werner Koch <wk@gnupg.org>