This patch is against 2.6.0-test4.
It fixes the pcmcia serial driver to know its now called 8250_cs and not 
serial_cs...

Without this patch 8250_cs compiles but doesn't work.
All the patch does is change several "serial_cs" occurences to "8250_cs".

PS.
another possible sollution is to change everything (including the file 
name) from "8250_cs" to "serial_cs" like it is in 2.4