powerpc/mpc8536DS:Increase binary size for mpc8536DS board

u-boot binary size for Freescale mpc8536DS platforms is 512KB.
This has been reached to upper limit of the platforms and causig
linker error. So increase the u-boot binary size to 768KB.
Signed-off-by: NHaijun Zhang <Haijun.Zhang@freescale.com>
Reviewed-by: NYork Sun <yorksun@freescale.com>

include/configs/MPC8536DS.h

@@ -42,7 +42,7 @@
 #endif
 
 #ifndef CONFIG_SYS_TEXT_BASE
-#define CONFIG_SYS_TEXT_BASE	0xeff80000
+#define CONFIG_SYS_TEXT_BASE	0xeff40000
 #endif
 
 #ifndef	CONFIG_RESET_VECTOR_ADDRESS
@@ -326,7 +326,7 @@
 
 /* NAND boot: 4K NAND loader config */
 #define CONFIG_SYS_NAND_SPL_SIZE	0x1000
-#define CONFIG_SYS_NAND_U_BOOT_SIZE	((512 << 10) - 0x2000)
+#define CONFIG_SYS_NAND_U_BOOT_SIZE	((768 << 10) - 0x2000)
 #define CONFIG_SYS_NAND_U_BOOT_DST	(CONFIG_SYS_INIT_L2_ADDR)
 #define CONFIG_SYS_NAND_U_BOOT_START \
 		(CONFIG_SYS_INIT_L2_ADDR + CONFIG_SYS_NAND_SPL_SIZE)
@@ -626,7 +626,7 @@
 #if defined(CONFIG_RAMBOOT_NAND)
 #define CONFIG_ENV_IS_IN_NAND	1
 #define CONFIG_ENV_SIZE		CONFIG_SYS_NAND_BLOCK_SIZE
-#define CONFIG_ENV_OFFSET ((512 * 1024) + CONFIG_SYS_NAND_BLOCK_SIZE)
+#define CONFIG_ENV_OFFSET ((768 * 1024) + CONFIG_SYS_NAND_BLOCK_SIZE)
 #define CONFIG_ENV_RANGE	(3 * CONFIG_ENV_SIZE)
 #elif defined(CONFIG_RAMBOOT_SPIFLASH)
 #define CONFIG_ENV_IS_IN_SPI_FLASH
@@ -649,11 +649,7 @@
 #endif
 #else
 	#define CONFIG_ENV_IS_IN_FLASH	1
-	#if CONFIG_SYS_MONITOR_BASE > 0xfff80000
-	#define CONFIG_ENV_ADDR		0xfff80000
-	#else
 	#define CONFIG_ENV_ADDR	(CONFIG_SYS_MONITOR_BASE - CONFIG_ENV_SECT_SIZE)
-	#endif
 	#define CONFIG_ENV_SIZE		0x2000
 	#define CONFIG_ENV_SECT_SIZE	0x20000 /* 128K (one sector) */
 #endif