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>

include/pcmcia/cistpl.h

@@ -616,6 +616,7 @@ int pccard_validate_cis(struct pcmcia_socket *s, unsigned int function, unsigned
 int pcmcia_loop_config(struct pcmcia_device *p_dev,
 		       int	(*conf_check)	(struct pcmcia_device *p_dev,
 						 cistpl_cftable_entry_t *cf,
+						 cistpl_cftable_entry_t *dflt,
 						 void *priv_data),
 		       void *priv_data);