pcmcia: pcmcia_config_loop() default CIS entry handling

Many drivers use the default CIS entry within their pcmcia_config_loop()
callback function. Therefore, factor the default CIS entry handling out.

Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
diff --git a/drivers/net/pcmcia/pcnet_cs.c b/drivers/net/pcmcia/pcnet_cs.c
index a606087..10fc537 100644
--- a/drivers/net/pcmcia/pcnet_cs.c
+++ b/drivers/net/pcmcia/pcnet_cs.c
@@ -514,6 +514,7 @@
 
 static int pcnet_confcheck(struct pcmcia_device *p_dev,
 			   cistpl_cftable_entry_t *cfg,
+			   cistpl_cftable_entry_t *dflt,
 			   void *priv_data)
 {
 	int *has_shmem = priv_data;