configs: Enable mac and phy configs

This patch adds MAC and PHY related configs (needed for proper
ethernet operations) for Action Semi S700 SoC.

Signed-off-by: Amit Singh Tomar <amittomer25@gmail.com>
diff --git a/configs/cubieboard7_defconfig b/configs/cubieboard7_defconfig
index 637dc9e..c82afc3 100644
--- a/configs/cubieboard7_defconfig
+++ b/configs/cubieboard7_defconfig
@@ -10,3 +10,7 @@
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_SYS_PROMPT="U-Boot => "
 CONFIG_DEFAULT_DEVICE_TREE="s700-cubieboard7"
+CONFIG_ETH_DESIGNWARE_S700=y
+CONFIG_ETH_DESIGNWARE=y
+CONFIG_PHY_REALTEK=y
+CONFIG_RTL8201F_PHY_S700_RMII_TIMINGS=y