drivers/net/skfp: fix sparse warning: Should it be static?

Impact: Move function declarations to header file.

Fix this sparse warnings:
  drivers/net/skfp/cfm.c:146:6: warning: symbol 'all_selection_criteria' was not declared. Should it be static?
  drivers/net/skfp/drvfbi.c:186:6: warning: symbol 'mac1_irq' was not declared. Should it be static?
  drivers/net/skfp/drvfbi.c:284:6: warning: symbol 'read_address' was not declared. Should it be static?
  drivers/net/skfp/drvfbi.c:323:6: warning: symbol 'init_board' was not declared. Should it be static?
  drivers/net/skfp/fplustm.c:72:24: warning: symbol 'fddi_broadcast' was not declared. Should it be static?
  drivers/net/skfp/fplustm.c:679:6: warning: symbol 'mac2_irq' was not declared. Should it be static?
  drivers/net/skfp/fplustm.c:805:6: warning: symbol 'mac3_irq' was not declared. Should it be static?
  drivers/net/skfp/fplustm.c:856:5: warning: symbol 'init_fplus' was not declared. Should it be static?
  drivers/net/skfp/pcmplc.c:404:6: warning: symbol 'init_plc' was not declared. Should it be static?
  drivers/net/skfp/pcmplc.c:1592:5: warning: symbol 'pcm_status_twisted' was not declared. Should it be static?
  drivers/net/skfp/smtinit.c:68:5: warning: symbol 'init_smt' was not declared. Should it be static?

Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/skfp/h/smc.h

@@ -467,5 +467,22 @@ struct s_smc {
 #endif	/* DEBUG_BRD && DEBUG */
 } ;
 
+extern const struct fddi_addr fddi_broadcast;
+
+extern void all_selection_criteria(struct s_smc *smc);
+extern void card_stop(struct s_smc *smc);
+extern void init_board(struct s_smc *smc, u_char *mac_addr);
+extern int init_fplus(struct s_smc *smc);
+extern void init_plc(struct s_smc *smc);
+extern int init_smt(struct s_smc *smc, u_char * mac_addr);
+extern void mac1_irq(struct s_smc *smc, u_short stu, u_short stl);
+extern void mac2_irq(struct s_smc *smc, u_short code_s2u, u_short code_s2l);
+extern void mac3_irq(struct s_smc *smc, u_short code_s3u, u_short code_s3l);
+extern int pcm_status_twisted(struct s_smc *smc);
+extern void plc1_irq(struct s_smc *smc);
+extern void plc2_irq(struct s_smc *smc);
+extern void read_address(struct s_smc *smc, u_char * mac_addr);
+extern void timer_irq(struct s_smc *smc);
+
 #endif	/* _SCMECM_ */