Migrate CONFIG_DRIVER_TI_CPSW to Kconfig

This converts CONFIG_DRIVER_TI_CPSW to Kconfig

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/configs/etamin_defconfig b/configs/etamin_defconfig
index 77f82af..6e5d4c2 100644
--- a/configs/etamin_defconfig
+++ b/configs/etamin_defconfig
@@ -65,7 +65,7 @@
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_MTD_UBI_FASTMAP=y
 CONFIG_MTD_UBI_FASTMAP_AUTOCONVERT=1
-CONFIG_PHYLIB=y
+CONFIG_DRIVER_TI_CPSW=y
 CONFIG_SYS_NS16550=y
 CONFIG_OMAP3_SPI=y
 CONFIG_USB=y