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/ti814x_evm_defconfig b/configs/ti814x_evm_defconfig
index 337f4f3..f26cd52 100644
--- a/configs/ti814x_evm_defconfig
+++ b/configs/ti814x_evm_defconfig
@@ -36,6 +36,6 @@
 CONFIG_BOOTP_GATEWAY=y
 CONFIG_BOOTP_SUBNETMASK=y
 CONFIG_MMC_OMAP_HS=y
-CONFIG_PHYLIB=y
+CONFIG_DRIVER_TI_CPSW=y
 CONFIG_SYS_NS16550=y
 CONFIG_OF_LIBFDT=y