[PATCH] powerpc: fsl: update fman dt binding for PCS PHY

[Shaohui Xie]

> > [S.H] 'compatible' and 'phy-mode' are standard properties already in
> > common Ethernet phy binding, I can update 'phy-mode' with
> > "1000base-kx" and "10gbase-kr", how about I still list the two
> > properties here for the requirement of PCS PHY to support backplane?
> 
> Yes. The common binding should list all possible values and this binding should
> list allowed values.
Got it.
Thank you!

Shaohui