scd: Don't limit to ST-2xxx for PC/SC.

* scd/apdu.c (pcsc_vendor_specific_init): Only check vender ID.

Some other products by Cherry works with pinpad, although it only works
for smaller keys (RSA 1024). TPDU support is good for larger keys.

• Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>