powerpc: mpc8641hpcn: Enable DHCP command and DDR debug

Enable DHCP command to make TFTP easier.
Enable DDR interactive debug by default.

Signed-off-by: York Sun <york.sun@nxp.com>

configs/MPC8641HPCN_defconfig

@@ -10,6 +10,7 @@ CONFIG_HUSH_PARSER=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_DHCP=y
 CONFIG_CMD_PING=y
 CONFIG_CMD_EXT2=y
 CONFIG_DOS_PARTITION=y

include/configs/MPC8641HPCN.h

@@ -101,7 +101,7 @@ extern unsigned long get_board_sys_clk(unsigned long dummy);
 /*
  * DDR Setup
  */
-#undef CONFIG_FSL_DDR_INTERACTIVE
+#define CONFIG_FSL_DDR_INTERACTIVE
 #define CONFIG_SPD_EEPROM		/* Use SPD EEPROM for DDR setup */
 #define CONFIG_DDR_SPD