[PCMCIA] Exclude uneeded code when ! CONFIG_PROC_FS

Patch from Michal Rokos

proc_pccard is declared twice, so remove the first declaration such
that it is only in ifdef CONFIG_PROC_FS block.
Signed-off-by: Russell King <rmk@arm.linux.org.uk>

drivers/pcmcia/ds.c

@@ -134,8 +134,6 @@ static dev_info_t dev_info = "Driver Services";
 
 static int major_dev = -1;
 
-static struct proc_dir_entry *proc_pccard;
-
 /*====================================================================*/
 
 /* code which was in cs.c before */