ath6kl: remove-typedef WINDOW_SNAPSHOT

remove-typedef -s WINDOW_SNAPSHOT \
	"struct window_snapshot" drivers/staging/ath6kl/

Tested-by: Naveen Singh <nsingh@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>