spidernet: add improved phy support in sungem_phy.c

[Benjamin Herrenschmidt]

On Fri, 2007-01-26 at 14:07 +0100, Jens Osterkamp wrote:
> This patch adds improved version of enable_fiber for both the 5421 and
> the 5461 phy. It is now possible to specify with these wether you want
> autonegotiation or not. This is needed for bladecenter switches where
> some expect autonegotiation and some dont seem to like this at all.
> Depending on this flag it sets phy->autoneg accordingly for the fiber mode.
> 
> More importantly it implements proper read_link and poll_link functions
> for both phys which can handle both copper and fiber mode by determining
> the medium first and then branching to the required functions. For fiber
> they all work fine, for copper they are not tested but return the result
> of the genmii_* function anyway which is supposed to work.
> 
> A "medium" variable in the phy struct is introduced to save the medium
> with which the phy is currently used.
> 
> The patch moves the genmii_* functions around to avoid foreward declarations.
> 
> Signed-off-by: Jens Osterkamp <jens at de.ibm.com>
> Signed-off-by: Arnd Bergmann <arnd.bergmann at de.ibm.com>

Patch is whitespace damaged...

Ben.