pcmcia: make pccard_loop_tuple() static

pccard_loop_tuple() is only used within drivers/pcmcia/pcmcia_cis.c, so
make that function static.
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

drivers/pcmcia/cs_internal.h

@@ -164,12 +164,6 @@ int pcmcia_replace_cis(struct pcmcia_socket *s,
 int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *count);
 int verify_cis_cache(struct pcmcia_socket *s);
 
-int pccard_loop_tuple(struct pcmcia_socket *s, unsigned int function,
-		      cisdata_t code, cisparse_t *parse, void *priv_data,
-		      int (*loop_tuple) (tuple_t *tuple,
-					 cisparse_t *parse,
-					 void *priv_data));
-
 int pccard_get_first_tuple(struct pcmcia_socket *s, unsigned int function,
 			tuple_t *tuple);
 

drivers/pcmcia/pcmcia_cis.c

@@ -78,7 +78,7 @@ int pccard_read_tuple(struct pcmcia_socket *s, unsigned int function,
  * calls the @loop_tuple function for each entry. If the call to @loop_tuple
  * returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
  */
-int pccard_loop_tuple(struct pcmcia_socket *s, unsigned int function,
+static int pccard_loop_tuple(struct pcmcia_socket *s, unsigned int function,
 			     cisdata_t code, cisparse_t *parse, void *priv_data,
 			     int (*loop_tuple) (tuple_t *tuple,
 					 cisparse_t *parse,