ColdFire: Update M5253DEMO configuration file

Fix incorrect default environment for flash erase or protect
range. Change offset from 0 to 0xff80nnnn. Remove default
ethernet setup and MAC address.

Signed-off-by: TsiChung Liew <tsicliew@gmail.com>

include/configs/M5253DEMO.h

@@ -95,11 +95,6 @@
 #	define DM9000_DATA		(CONFIG_DM9000_BASE + 4)
 #	undef CONFIG_DM9000_DEBUG
 
-#	define CONFIG_ETHADDR		00:e0:0c:bc:e5:60
-#	define CONFIG_IPADDR		10.82.121.249
-#	define CONFIG_NETMASK		255.255.252.0
-#	define CONFIG_SERVERIP		10.82.120.80
-#	define CONFIG_GATEWAYIP		10.82.123.254
 #	define CONFIG_OVERWRITE_ETHADDR_ONCE
 
 #	define CONFIG_EXTRA_ENV_SETTINGS		\
@@ -109,8 +104,8 @@
 		"u-boot=u-boot.bin\0"			\
 		"load=tftp ${loadaddr) ${u-boot}\0"	\
 		"upd=run load; run prog\0"		\
-		"prog=prot off 0 2ffff;"	\
-		"era 0 2ffff;"			\
+		"prog=prot off 0xff800000 0xff82ffff;"	\
+		"era 0xff800000 0xff82ffff;"		\
 		"cp.b ${loadaddr} 0 ${filesize};"	\
 		"save\0"				\
 		""