powerpc: mpc8568mds: Update board config

Enable DHCP command by default. Move environmental variable location
to before U-Boot image. Enlarge reserved mem for malloc. Update
maintainer.

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

board/freescale/mpc8568mds/MAINTAINERS

 MPC8568MDS BOARD
-#M:	-
+M:	York Sun <york.sun@nxp.com>
 S:	Maintained
 F:	board/freescale/mpc8568mds/
 F:	include/configs/MPC8568MDS.h

configs/MPC8568MDS_defconfig

@@ -7,6 +7,7 @@ CONFIG_OF_STDOUT_VIA_ALIAS=y
 CONFIG_BOOTDELAY=10
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_HUSH_PARSER=y
+CONFIG_CMD_DHCP=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y

include/configs/MPC8568MDS.h

@@ -206,7 +206,7 @@ extern unsigned long get_clock_freq(void);
 #define CONFIG_SYS_INIT_SP_OFFSET	CONFIG_SYS_GBL_DATA_OFFSET
 
 #define CONFIG_SYS_MONITOR_LEN		(256 * 1024) /* Reserve 256 kB for Mon */
-#define CONFIG_SYS_MALLOC_LEN		(128 * 1024)	/* Reserved for malloc */
+#define CONFIG_SYS_MALLOC_LEN		(512 * 1024)	/* Reserved for malloc */
 
 /* Serial Port */
 #define CONFIG_CONS_INDEX		1
@@ -337,9 +337,9 @@ extern unsigned long get_clock_freq(void);
  * Environment
  */
 #define CONFIG_ENV_IS_IN_FLASH	1
-#define CONFIG_ENV_ADDR		(CONFIG_SYS_MONITOR_BASE + 0x40000)
-#define CONFIG_ENV_SECT_SIZE	0x40000	/* 256K(one sector) for env */
+#define CONFIG_ENV_SECT_SIZE	0x20000	/* 128K(one sector) for env */
 #define CONFIG_ENV_SIZE		0x2000
+#define CONFIG_ENV_ADDR		(CONFIG_SYS_MONITOR_BASE - CONFIG_ENV_SECT_SIZE)
 
 #define CONFIG_LOADS_ECHO	1	/* echo on for serial download */
 #define CONFIG_SYS_LOADS_BAUD_CHANGE	1	/* allow baudrate change */