[PATCH] pcmcia: new IDs for serial_cs

Add new ID to serial_cs.c; the CIS fimware override is available by the
manufacturer at http://www.sierrawireless.com

 .  Remember to name the CIS
binary SW_7xx_SER.cis and to put it into /lib/firmware/

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