Staging: w35und: remove gl_80211.h header

The gl_80211.h header file contains only two definitions that are actually
used. Move them to mds_s.h and remove the otherwise unused file.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>