[PATCH] remove pointless debug printk in rt_ioctl_giwscan()

[Giangiacomo Mariotti]

This debug printk is only useful if you're debugging the staging drivers
2860 e 2870, but, if you're just using them, it becomes really annoying, because
it uselessly clobbers the kernel log. I guess this patch shouldn't really get merged,
but it's more like a request to remove these annoying debugging messages for normal users.
If I get any suggestion on how to implement this in a way acceptable to get it merged, I'll
be happy to create the "good" version  of the patch.

Thanks,

Giangiacomo