pcmcia: add pcmcia_loop_config() helper

By calling pcmcia_loop_config(), a pcmcia driver can iterate over all
available configuration options. During a driver's probe() phase, one
doesn't need to use pcmcia_get_{first,next}_tuple, pcmcia_get_tuple_data
and pcmcia_parse_tuple directly in most if not all cases.

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

include/pcmcia/cistpl.h

@@ -613,4 +613,10 @@ int pccard_validate_cis(struct pcmcia_socket *s, unsigned int function, unsigned
 #define pcmcia_validate_cis(p_dev, info) \
 		pccard_validate_cis(p_dev->socket, p_dev->func, info)
 
+int pcmcia_loop_config(struct pcmcia_device *p_dev,
+		       int	(*conf_check)	(struct pcmcia_device *p_dev,
+						 cistpl_cftable_entry_t *cf,
+						 void *priv_data),
+		       void *priv_data);
+
 #endif /* LINUX_CISTPL_H */