ARM: rmobile: Enable dfu tftp on Gen3

Enable the fitImage update options on RCar Gen3 boards.
This permits easy update of multiple bootloader components.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/configs/r8a77970_eagle_defconfig b/configs/r8a77970_eagle_defconfig
index 55b29b2..160d563 100644
--- a/configs/r8a77970_eagle_defconfig
+++ b/configs/r8a77970_eagle_defconfig
@@ -20,6 +20,7 @@
 CONFIG_VERSION_VARIABLE=y
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
+CONFIG_CMD_DFU=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_SPI=y
@@ -41,6 +42,9 @@
 CONFIG_BLK=y
 CONFIG_CLK=y
 CONFIG_CLK_RENESAS=y
+CONFIG_DFU_TFTP=y
+CONFIG_DFU_RAM=y
+CONFIG_DFU_SF=y
 CONFIG_RCAR_GPIO=y
 CONFIG_DM_I2C=y
 CONFIG_SYS_I2C_RCAR_IIC=y