staging: comedi: cb_das16_cs: remove CONFIG_PCMCIA check

The Kconfig ensures that this driver can only be build it PCMCIA is
enabled. Remove the unneeded '#if defined (CONFIG_PCMCIA) ,,,' and
the '#else' code.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Cc: Frank Mori Hess <fmhess@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>