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/drivers/net/Kconfig b/drivers/net/Kconfig
index d86da77..5441da4 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -241,6 +241,11 @@
 	  Enable the support of the Reduced Gigabit Media-Independent
 	  Interface (RGMII).
 
+config MII
+	bool "Enable MII"
+	help
+	  Enable support of the Media-Independent Interface (MII)
+
 config RTL8139
 	bool "Realtek 8139 series Ethernet controller driver"
 	help
@@ -317,6 +322,11 @@
 	help
 	  This driver supports the Ethernet for Renesas SH and ARM SoCs.
 
+config DRIVER_TI_EMAC
+	bool "TI Davinci EMAC"
+	help
+	   Support for davinci emac
+
 config XILINX_AXIEMAC
 	depends on DM_ETH && (MICROBLAZE || ARCH_ZYNQ || ARCH_ZYNQMP)
 	select PHYLIB