mpc83xx: MPC8360ERDK: fix environment offset configuration bug

The size of U-Boot binary for MPC8360ERDK increased
(> 2 flash sectors now), so 'saveenv' will partially
overwrite U-Boot in flash and will brick the board.
This patch moves environment offset to fourth flash
sector and also fixes CONFIG_SYS_MONITOR_LEN.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

include/configs/MPC8360ERDK.h

@@ -162,7 +162,7 @@
 #undef	CONFIG_SYS_RAMBOOT
 #endif
 
-#define CONFIG_SYS_MONITOR_LEN		(256 * 1024) /* Reserve 256 kB for Mon */
+#define CONFIG_SYS_MONITOR_LEN		(384 * 1024) /* Reserve 384 kB for Mon */
 #define CONFIG_SYS_MALLOC_LEN		(128 * 1024) /* Reserved for malloc */
 
 /*
@@ -339,7 +339,7 @@
 
 #ifndef CONFIG_SYS_RAMBOOT
 #define CONFIG_ENV_IS_IN_FLASH	1
-#define CONFIG_ENV_ADDR		(CONFIG_SYS_MONITOR_BASE + 0x40000)
+#define CONFIG_ENV_ADDR		(CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)
 #define CONFIG_ENV_SECT_SIZE	0x20000 /* 128K(one sector) for env */
 #define CONFIG_ENV_SIZE		0x20000
 #else /* CONFIG_SYS_RAMBOOT */