With this the driver supports the ethtool_ops {get,set}_msglvl,
{get,set}_settings, get_stats, get_link, and nway_reset.

Unlike the first patch, the userspace ioctl functions are protected with
spin_lock_irqsave.  Furter I moved the spin_lock_bh from the
mdio_{read,write} functions to vortex_timer().  All the locks acquire
vp->lock now, vp->mdio_lock is not used any more.  
Signed-off-by: Steffen Klassert <klassert@mathematik.tu-chemnitz.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>