powerpc/fsl/defconfig: enable CONFIG_AT803X_PHY

Enable CONFIG_AT803X_PHY to support AR8030/8033/8035 PHY.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>

diff --cc arch/powerpc/configs/corenet32_smp_defconfig
Simple merge

diff --cc arch/powerpc/configs/mpc85xx_defconfig
Simple merge

diff --cc arch/powerpc/configs/mpc85xx_smp_defconfig
Simple merge