remove support for non-ANSI compilation

*** 17,26 ****
--- 17,28 ----
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
  /*
+  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+  *
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  /*
*** 139,161 ****
  #ifdef  _KERNEL
  extern int localetheraddr(struct ether_addr *, struct ether_addr *);
  extern char *ether_sprintf(struct ether_addr *);
  extern int ether_aton(char *, uchar_t *);
  #else   /* _KERNEL */
- #ifdef  __STDC__
  extern char *ether_ntoa(const struct ether_addr *);
  extern struct ether_addr *ether_aton(const char *);
  extern int ether_ntohost(char *, const struct ether_addr *);
  extern int ether_hostton(const char *, struct ether_addr *);
  extern int ether_line(const char *, struct ether_addr *, char *);
- #else   /* __STDC__ */
- extern char *ether_ntoa();
- extern struct ether_addr *ether_aton();
- extern int ether_ntohost();
- extern int ether_hostton();
- extern int ether_line();
- #endif  /* __STDC__ */
  #endif  /* _KERNEL */
  
  #ifdef  __cplusplus
  }
  #endif
--- 141,155 ----