powerpc: mpc8544ds: Enable DHCP command by default

Signed-off-by: York Sun <york.sun@nxp.com>
diff --git a/configs/MPC8544DS_defconfig b/configs/MPC8544DS_defconfig
index 1798622..4e2b8e6 100644
--- a/configs/MPC8544DS_defconfig
+++ b/configs/MPC8544DS_defconfig
@@ -8,6 +8,7 @@
 CONFIG_BOOTDELAY=10
 # CONFIG_CONSOLE_MUX is not set
 CONFIG_HUSH_PARSER=y
+CONFIG_CMD_DHCP=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_MII=y