firmware: pcmcia/ds: prepare for FIRMWARE_NAME_MAX removal

We're going to remove the FIRMWARE_NAME_MAX definition in order to avoid any
firmware name length restriction.
With the FIRMWARE_NAME_MAX removal, the ds.c reference becomes useless as we
dont need to check for the firmware name length anymore.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>