staging: wlan-ng: scripts/checkpatch.pl error fixes.

scripts/checkpatch.pl error fixes. This is a TODO item.
This patch fixes most of the errors reported by checkpatch.pl in
wlan-ng directory of staging tree.

Signed-off-by: Mithlesh Thukral <mithlesh@linsyssoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>