Staging: wlan-ng: tidy up iw_handler

Use array initialisation technique copied from ipw2200.c.

This should always get the function pointers in the correct place,
without the needed for endless counting, skipping blanks etc.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>