[hci] Expose ifcommon_exec() in a local header so wireless commands can use it

This keeps code size down, since the wireless interface management
commands have the same command-line interface and overall structure as
the wired commands.

Signed-off-by: Michael Brown <mcb30@etherboot.org>

src/hci/commands/ifmgmt_cmd.c

 #include <gpxe/netdevice.h>
 #include <gpxe/command.h>
 #include <usr/ifmgmt.h>
+#include "ifmgmt_cmd.h"
 
 /** @file
  *
  * @v argv		Argument list
  * @ret rc		Exit code
  */
-static __attribute__ (( regparm ( 2 ) )) int
+__attribute__ (( regparm ( 2 ) )) int
 ifcommon_exec ( int ( * payload ) ( struct net_device * ),
 		const char *verb, int argc, char **argv ) {
 	int c;

src/hci/commands/ifmgmt_cmd.h

+/*
+ * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _IFMGMT_CMD_H
+#define _IFMGMT_CMD_H
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+struct net_device;
+
+extern int ifcommon_exec ( int ( * payload ) ( struct net_device * ),
+			   const char *verb, int argc, char **argv )
+	__attribute__ (( regparm ( 2 ) ));
+
+#endif /* _IFMGMT_CMD_H */