staging: rtl8187se: use netdev_warn instead of printk

This patch fixes this type of checkpatch warnings:

WARNING: Prefer netdev_warn(netdev, ... then dev_warn(dev, ... then
pr_warn(...  to printk(KERN_WARNING ...

Signed-off-by: Teodora Baluta <teobaluta@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed