arm: MediaTek: add ethernet support for MT7629 boards

Enable ethernet related configs to mt7629_rfb_defconfig.
Add default IP addresses.
Enable noncached memory region required by ethernet driver.

Signed-off-by: Mark Lee <Mark-MC.Lee@mediatek.com>
diff --git a/configs/mt7629_rfb_defconfig b/configs/mt7629_rfb_defconfig
index 1729d13..fdd5f57 100644
--- a/configs/mt7629_rfb_defconfig
+++ b/configs/mt7629_rfb_defconfig
@@ -32,6 +32,7 @@
 CONFIG_OF_EMBED=y
 CONFIG_DEFAULT_DEVICE_TREE="mt7629-rfb"
 CONFIG_OF_SPL_REMOVE_PROPS="pinctrl-0 pinctrl-names clock-names interrupt-parent assigned-clocks assigned-clock-parents"
+CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPL_DM_SEQ_ALIAS=y
 CONFIG_REGMAP=y
 CONFIG_SPL_REGMAP=y
@@ -51,6 +52,10 @@
 CONFIG_SPI_FLASH_SPANSION=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_DM_RESET=y
+CONFIG_RESET_MEDIATEK=y
+CONFIG_DM_ETH=y
+CONFIG_MEDIATEK_ETH=y
 CONFIG_PINCTRL=y
 CONFIG_PINCONF=y
 CONFIG_PINCTRL_MT7629=y