Convert CONFIG_MII et al to Kconfig

This converts the following to Kconfig:
   CONFIG_MII
   CONFIG_DRIVER_TI_EMAC

Signed-off-by: Adam Ford <aford173@gmail.com>
Acked-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/configs/cgtqmx6eval_defconfig b/configs/cgtqmx6eval_defconfig
index 1dc7ec4..2d6da0d 100644
--- a/configs/cgtqmx6eval_defconfig
+++ b/configs/cgtqmx6eval_defconfig
@@ -54,6 +54,7 @@
 CONFIG_FASTBOOT_BUF_ADDR=0x12000000
 CONFIG_FSL_ESDHC=y
 CONFIG_PHYLIB=y
+CONFIG_MII=y
 CONFIG_SPI=y
 CONFIG_MXC_SPI=y
 CONFIG_USB=y