fixed phy support (warning related to FIXED_MII_100_FDX)

[Kumar Gala]

Anton,

it looks like the "TI AR7 CPMAC Ethernet support" uses FIXED_PHY and  
was selecting FIXED_MII_100_FDX which is gone.

Can you look into this.  I get the following warning now:

scripts/kconfig/conf -s arch/powerpc/Kconfig
drivers/net/Kconfig:1713:warning: 'select' used by config symbol  
'CPMAC' refers to undefined symbol 'FIXED_MII_100_FDX'

- k