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/dra7xx_evm_defconfig b/configs/dra7xx_evm_defconfig
index cb210cf..56defe1 100644
--- a/configs/dra7xx_evm_defconfig
+++ b/configs/dra7xx_evm_defconfig
@@ -60,8 +60,8 @@
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_BAR=y
 CONFIG_SPI_FLASH_SPANSION=y
-CONFIG_PHYLIB=y
 CONFIG_DM_ETH=y
+CONFIG_DRIVER_TI_CPSW=y
 CONFIG_PHY_GIGE=y
 CONFIG_SPL_PHY=y
 CONFIG_PMIC_PALMAS=y