net: sh-eth: Add to Kconfig and convert

This adds SH_ETHER to drivers/net/Kconfig and convert to Kconfig.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/configs/ecovec_defconfig b/configs/ecovec_defconfig
index 5d65e9d..5c6c55f 100644
--- a/configs/ecovec_defconfig
+++ b/configs/ecovec_defconfig
@@ -29,7 +29,8 @@
 CONFIG_CMD_FAT=y
 CONFIG_ENV_IS_IN_FLASH=y
 CONFIG_MTD_NOR_FLASH=y
-CONFIG_PHYLIB=y
+CONFIG_NETDEVICES=y
+CONFIG_SH_ETHER=y
 CONFIG_SCIF_CONSOLE=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y