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/sh7752evb_defconfig b/configs/sh7752evb_defconfig
index 3152859..9e4f5aa 100644
--- a/configs/sh7752evb_defconfig
+++ b/configs/sh7752evb_defconfig
@@ -34,6 +34,7 @@
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_MACRONIX=y
 CONFIG_SPI_FLASH_STMICRO=y
-CONFIG_PHYLIB=y
+CONFIG_NETDEVICES=y
+CONFIG_SH_ETHER=y
 CONFIG_SCIF_CONSOLE=y
 CONFIG_USE_PRIVATE_LIBGCC=y