[legal] Add FILE_LICENCE macro to some GPL-v2 files

Changes were made to files where the licence text within the files
themselves confirms that the files are GPL version 2.

Signed-off-by: Shao Miller <shao.miller@yrdsb.edu.on.ca>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/core/pcmcia.c

  *	at some point. If there's anything obvious or better, not-so-obvious,
  *	please contact me by e-mail: anselm (AT) hoffmeister (DOT) be   *THANKS*
  */
+
+FILE_LICENCE ( GPL2_ONLY );
+
 #include <stdio.h>
 #include <pcmcia.h>
 #include <i82365.h>

src/core/stringextra.c

  * published by the Free Software Foundation.
  */
 
+FILE_LICENCE ( GPL2_ONLY );
+
 /*
  * stupid library routines.. The optimized versions should generally be found
  * as inline code in <asm-xx/string.h>

src/include/i82365.h

  * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  */
 
+FILE_LICENCE ( GPL2_ONLY );
+
 #ifndef _LINUX_I82365_H
 #define _LINUX_I82365_H