staging: ath6kl: cleanup in SEND_FRAME ioctl

The original code was written in a funny way where every statement was
part of else if blocks.  I broke them up into separate statements by
adding breaks on failure conditions.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Vipin Mehta <vipin.mehta@atheros.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>