pcmcia: remove unused argument to pcmcia_parse_tuple()

Since we're just parsing the tuple being passed to this function, we don't
need any device-specific information.

Also, remove the call to pcmcia_validate_cis() from pcmciamtd.c, since it
is already called by the PCMCIA core.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>