powerpc/fsl: Enable CONFIG_E1000E in mpc85xx_smp_defconfig

On the most boards of Freescale platform, they use the PCI-Express
Intel(R) PRO/1000 gigabit ethernet card to work. So enable the
corresponding driver for it.
Signed-off-by: NChunhe Lan <Chunhe.Lan@freescale.com>
Signed-off-by: NScott Wood <scottwood@freescale.com>

arch/powerpc/configs/mpc85xx_smp_defconfig

@@ -131,6 +131,7 @@ CONFIG_DUMMY=y
 CONFIG_FS_ENET=y
 CONFIG_UCC_GETH=y
 CONFIG_GIANFAR=y
+CONFIG_E1000E=y
 CONFIG_MARVELL_PHY=y
 CONFIG_DAVICOM_PHY=y
 CONFIG_CICADA_PHY=y